Answer:
B
17.6%
Explanation:
1. Percentage yield = (Actual yield/theoretical yield) x 100
2. You know actual yield of ammonia (60kg) so you need to work out theoretical yield.
3. mols of hydrogen = m/mr = 60,000/2 = 30,000 mols.
4. 3:2 ratio so (30,000/3) x 2 = 20,000 mols of Ammonia.
5. Therefore mass of ammonia = mr x mols = 20,000 x 17 = 340,000 grams
6. So percentage yield is (60,000/340,000) x 100 = 17.6
1. Stan walk 15 km west to the grocery store he shops then walk back 20km east to his house what distance did he cover what was his displacement
Answer:
His displacement is 0 km because he ends his walk where he started. The total distance of his walk is 20 km because he walks 10 km to the store + 10km back home.
Explanation:
Hope this helps:)
The total distance covered by stan is equal to 35 Km and his displacement is equal to 5 km.
What are distance and displacement?The distance of an object can be defined as the total path covered by an object. Distance is a scalar quantity posses only magnitude with no direction. The distance of an object is always positive, as it can never be zero.
The displacement can be defined as the shortest distance between the two points. The displacement of an object is a vector quantity posses with both direction and magnitude. The displacement can be positive, negative, or zero and can also increase or decrease with time.
Consider O is the starting point and the distance from O to the west direction to point A, OA = 15 Km
Then from A to back in the east direction to point B, AB = 20 Km
The distance covered by stan = OA + AB = 15 + 20 = 35 Km
The distance between point A and point B is equal to displacement.
Displacement = AB - OA = 20 -15 = 5 Km
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which isotope has a longer half-life? select the correct answer and explanation. which isotope has a longer half-life? select the correct answer and explanation. 235u has a longer half-life because less of it have decayed. 238u has a longer half-life because less of it have decayed. 235u has a longer half-life because more of it have decayed. 238u has a longer half-life because more of it have decayed.
Out of the options given, the correct answer is "238u has a longer half-life because less of it have decayed.
Half-life is defined as the time taken by the atoms to decay to half of its original amount. Uranium has two naturally occurring isotopes, 235U and 238U, with half-lives of 703.8 million years and 4.47 billion years respectively. Since 238U has a longer half-life than 235U, it is the most common radioactive isotope in the earth's crust. Therefore, it can be concluded that the correct answer is 238u has a longer half-life because less of it has decayed.
238u has a longer half-life because less of it has decayed. The half-life of 238U is 4.47 billion years, which means that half of its atoms would still be remaining after this time period has elapsed. This is why it is the most common radioactive isotope found in the earth's crust. 235U, on the other hand, has a half-life of only 703.8 million years.
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How many grams are there in 7.40 moles of AgNO3
Answer:
169.87 grams
Explanation:
Discuss the phenomena of sunrise and sunset seen on Earth and describe how they will be different from the perspective of outer space.
Answer:
its very dark and scary
Explanation:
What volume would be occupied by 0.50 moles of a gas at a temperature of 35°C and at a 1 atm of pressure?
O 11.2L
O 1.68 L
O 12.6 L
0 145L
The volume occupied by 0.50 mole of the gas at a temperature of 35 °C and at 1 atm is 12.6 L (3rd option)
How do i determine the volume occupied?Number of mole of gas (n) = 0.50 moleTemperature of gas (T) = 35 °C = 35 + 273 = 308 KPressure of gas (P) = 1 atmGas constant (R) = 0.0821 atm.L/molKVolume of gas (V) =?We can obtain the volume of the gas by using the ideal gas equation as shown below:
PV = nRT
1 × V = 0.50 × 0.0821 × 308
V = 12.6 L
Thus, from the above calculation, it is evident that the volume of gas is 12.6 L (3rd option)
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what about the electrons in metal elements contributes to metallic bonding?
In metallic bonding, the valence electrons of metal atoms are free to move throughout the entire crystal structure of the metal.
This mobility of electrons in the metal crystal structure is the key feature that contributes to metallic bonding. The delocalized electrons are attracted to the positively charged metal ions, which hold the electrons together in the crystal lattice through electrostatic forces.
The unique behavior of valence electrons in metal elements makes metallic bonding one of the strongest types of chemical bonds, with high melting and boiling points and high tensile strength.
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A 10.00 mL diluted chloride sample was titrated with 0.02749 M AgNO3, and 16.51 mL AgNO, was required to reach the endpoint. How would the following errors affect the calculated concentration of CI? a. The student read the molarity of AgNO, as 0.02479 M instead of 0.02749 M. The experimentally calculated moles of Ag would be too! calculated [CI] in the unknown would come out too b. The student was past the endpoint of the titration when the final buret reading was taken. v The experimentally determined moles of Ag would be too | calculated C1 concentration. so the calculated moles of CI would come out too so the calculated moles of CI would come out ✓ The as would the
The effect of errors on the calculated concentration of CI is significant.
A 10.00 mL diluted chloride sample was titrated with 0.02749 M AgNO3, and 16.51 mL AgNO, was required to reach the endpoint. The effect of errors on the calculated concentration of CI can be explained as follows:a. The student read the molarity of AgNO, as 0.02479 M instead of 0.02749 M. If the student read the molarity of AgNO, as 0.02479 M instead of 0.02749 M, then the experimentally calculated moles of Ag would be too high. Consequently, the calculated [CI] in the unknown would come out too low. b.
The student was past the endpoint of the titration when the final buret reading was taken. If the student was past the endpoint of the titration when the final buret reading was taken, then the experimentally determined moles of Ag would be too low. This would cause the calculated C1 concentration to come out too high. Consequently, the calculated moles of CI would come out too high. Therefore, the effect of errors on the calculated concentration of CI is significant.
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Which of the following contains salt water?
Lake
Ocean
River
Glacier
Answer:
Ocean
Explanation:
The maximum salinity is about 35 parts per mille. Among other terms, around 3.5 per cent of seawater weight is produced from salts dissolved.
So a lot of salt water in oceans
Hope this helps.
Answer:
b)
Explanation:
ocean is a containing salt water
Examine the reaction. NH4OH(aq) →H2O(l) + NH3(g)
What coefficients will balance the equation?
A) 1, 1, 1
B) 3, 3, 4
C) 2, 1, 2
D) 1, 2, 2
Answer: A. 1,1,1
Explanation:
The coefficients that will balance the equation; NH4OH(aq) →H2O(l) + NH3(g), is 1, 1, 1, because it proves the total number of atoms of each element on the LHS and RHS of the equation are equal, hence balanced.
LHS RHS
N = 1 1
H = 5 5
O = 1 1
If one solution has 10 g of salt in 100 ml of water and one has 30 g of salt in 100 g of water, the one with 10 g is more _____ than the one with 30 g of salt.
a saturated
b concentrated
c dense
d dilute
If one solution has 10g of salt in 100 ml of water and one has 30g of salt in 100 g of water, the one with 10g is more dilute than the one with 30 g of salt.
A dilute solution is a solution is one in which small amount of solute is dissolved in a large amount of solvent whereas a concentrated solution is one in which comparatively large amount of solute is dissolved in comparatively small amount of solvent.
So, the solution in which 10g salt is dissolved in 100 ml water is diluted and the solution will contains more solute i.e 30g salt in 100 ml water is concentrated than the former.
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How does a balanced chemical equation help me predict my product amount?
The coefficients in front of each reactant and product allow us to predict how much reactants are required to form a given amount of products.
What is chemical equation?Reactants are converted to products and the process is symbolized by a chemical equation. For example (Fe) and (S) combine to form iron sulfide Fe(s) + S(s) → FeS(s) The plus sign indicates that iron reacts with sulfur.
Therefore, chemical equation is a mathematical expression of the chemical reaction which represents the product formation from the reactants. In an equation the reactants are written on the left-hand side and the products are written on the right-hand side demonstrated by one-headed.
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Evaluate each scenario described to determine the direction of heat flow. A glass of ice water. Ice cube to tap water tap water to ice cube.
To determine the direction of heat flow in each scenario, we need to consider the temperature difference between the objects involved.
Heat always flows from an object at a higher temperature to an object at a lower temperature until thermal equilibrium is reached.
1. A glass of ice water:
In this scenario, the glass of ice water consists of two components: the ice and the water. The ice has a temperature below 0°C (32°F), while the water is at or slightly above 0°C (32°F). The surroundings, including the air and the glass, are generally at a higher temperature than the ice.
Heat flow: The heat flows from the surroundings (air and glass) to the ice and water to increase their temperature and melt the ice. Therefore, heat flows into the glass of ice water.
2. Ice cube to tap water:
In this scenario, the ice cube is at a temperature below 0°C (32°F), while the tap water is typically at room temperature or slightly higher.
Heat flow: The heat flows from the tap water to the ice cube because the tap water has a higher temperature than the ice cube. The heat from the water raises the temperature of the ice cube, causing it to melt. Therefore, heat flows into the ice cube from the tap water.
3. Tap water to ice cube:
In this scenario, the tap water is at room temperature or slightly higher, while the ice cube is at a temperature below 0°C (32°F).
Heat flow: The heat flows from the ice cube to the tap water because the tap water has a lower temperature than the ice cube. The heat from the ice cube lowers the temperature of the tap water, causing it to cool down. Therefore, heat flows out of the ice cube to the tap water.
In summary:
- In a glass of ice water, heat flows into the glass of ice water.
- In the interaction between an ice cube and tap water, heat flows from the tap water to the ice cube.
- In the interaction between tap water and an ice cube, heat flows from the ice cube to the tap water.
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Match up the characteristics below with the type of molecular bond they describe. Bonds found in Halite (between Na+ and Cl-) Bonds found between Si and O in the Si-O tetrahedron Bonds inside the water molecule (between the H and O ) Bonds that exist between two water molecules Strongest bond type Weakest bond type Bonds that are used by water to dissolve sal
The characteristics and the type of molecular bond they describe:
1. Bonds found in Halite (between Na⁺ and Cl⁻): Ionic bond
2. Bonds found between Si and O in the Si-O tetrahedron: Covalent bond
3. Bonds inside the water molecule (between the H and O): Covalent bond
4. Bonds that exist between two water molecules: Hydrogen bond
5. Strongest bond type: Covalent bond
6. Weakest bond type: Van der Waals bond
7. Bonds that are used by water to dissolve salt: Ionic bond
The ionic bond is a type of molecular bond found in halite (between Na⁺ and Cl⁻). The Si-O tetrahedron is held together by a covalent bond. The bond inside the water molecule (between the H and O) is also a covalent bond. The hydrogen bond is the type of bond that exists between two water molecules. The covalent bond is the strongest bond type, while the van der Waals bond is the weakest bond type. Water uses the ionic bond to dissolve the salt.
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Sean is moving heavy furniture by sliding it
across the floor. He puts a blanket
underneath the furniture. Why did this help
him?
Answer:
the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.
Answer:
Blanket underneath the furniture may reduce the kinetic friction
Explanation:
When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.
By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.
Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.
(Hi fyi this answer took a lot of time & effort to make sure it was accurate, precise and to the point to be produced, so if you could opt this answer as the brainliest it would mean the world to me,)
Stay positive and Take care,
A fellow mate,
Cheers !
a) Identify a possible mechanism. b) Define catalyst c) Determine the general order of the reaction. 4. For the reaction at equilibrium: 3Fe+410 Fe,0+4H a) Write the expression of the equilibrium constant. b) Show how the speed of the direct and indirect reaction changes, if the pressure increases 3 times. e) Argue whether the chemical equilibrium shifts when the pressure increases 3 times. (4 points)
3. a) One possible mechanism for this reaction is: 3 Fe + 4 H₂O ⇌ Fe₃O₄ + 4 H₂
b) A catalyst is a substance that increases the rate of a chemical reaction without undergoing any permanent chemical change itself.
c) second-order reaction.
4. a) The expression of the equilibrium constant for the given reaction is:
Kc = ([Fe₃O₄][H₂]⁴) / ([Fe]³[H₂O]⁴)
b) Increasing the pressure will favor the indirect reaction and slow down the direct reaction.
c) Since the indirect reaction is favored by the increased pressure, the chemical equilibrium will shift to the right, towards the product side.
How to express order of reaction?The method of initial rates involves measuring the initial rate of the reaction under different initial concentrations of the reactants. By comparing the initial rates, we can determine the order of the reaction with respect to each reactant.
Assuming that the rate law of the reaction is:
rate = k[Fe]^x[H₂O]^y
where k is the rate constant, and x and y are the orders of the reaction with respect to Fe and H2O, respectively.
Experimentally, measure the initial rate of the reaction under different initial concentrations of Fe and H₂O while keeping the concentration of the other reactant constant.
For example, suppose we measure the initial rates of the reaction at the following initial concentrations:
Experiment #1: [Fe] = 0.1 M, [H₂O] = 0.2 M, initial rate = 0.005 M/s
Experiment #2: [Fe] = 0.2 M, [H₂O] = 0.2 M, initial rate = 0.02 M/s
Experiment #3: [Fe] = 0.4 M, [H₂O] = 0.2 M, initial rate = 0.08 M/s
Use the rate data to determine the orders of the reaction with respect to Fe and H₂O. To do this, we compare the initial rates of the reaction under different initial concentrations of Fe and H₂O while keeping the concentration of the other reactant constant.
Suppose we double the concentration of Fe while keeping the concentration of H₂O constant. According to experiment 2 and experiment 1, the rate of the reaction doubles. This means that the order of the reaction with respect to Fe is 1.
Similarly, if we double the concentration of H₂O while keeping the concentration of Fe constant, we can see that the rate of the reaction doubles from experiment 1 to experiment 3. This means that the order of the reaction with respect to H₂O is also 1.
Therefore, the overall order of the reaction is the sum of the orders of the reactants, which is:
overall order = 1 + 1 = 2
Hence, the given reaction is a second-order reaction.
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The complete question is:
3. For the reaction at equilibrium: 3Fe+410 Fe,0+4H a) Identify a possible mechanism. b) Define catalyst c) Determine the general order of the reaction. 4. For the reaction at equilibrium: 3Fe+410 Fe,0+4H a) Write the expression of the equilibrium constant. b) Show how the speed of the direct and indirect reaction changes, if the pressure increases 3 times. e) Argue whether the chemical equilibrium shifts when the pressure increases 3 times. (4 points)
High explosives will create what at the point of origin?
A. A mound of debris
B. A crater
C. A secondary explosion
D. A lack of hydrogen
Answer: A Crater
(took the test)
High explosives will generally create a crater at the point of origin.
Explosives and cratersExplosions have to do with volume expansion and the release of a high amount of energy.
Thus, materials that surround an explosive are usually ejected and displaced in the process of explosion.
The high-pressure gas and the shock waves generated when explosives explode cause grounds to deform, eject materials out of it, and scatter them all about. This results in the creation of a hollow structure known as craters in the ground.
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Now prepare the cold sand and cold water samples from part A:
Fill a 100-milliliter container with 50 grams of sand. Fill a 100-milliliter container with 50 grams of cold tap water. Fill the last 100-milliliter container with 100 grams of cold tap water. Use the scale to measure the masses.
a scale measuring 100 grams of cold water in a 100-milliliter container, with 100-milliliter containers holding 50 grams of sand and 50 grams of cold water alongside
Pour all the ice cubes into a tub, and fill it with cool tap water to a depth of 2 inches. Place the sand and water samples in the ice water. Cover the entire tub.
three 100-milliliter containers in an ice bath inside a covered tub, with one container holding 50 grams of sand, one holding 50 grams of cold water, and one holding 100 grams of cold water
Every 15 minutes, remove the cover and check the temperatures of the samples using the three thermometers. Wait 30 seconds before recording the thermometer reading. Once the temperatures of the three samples are no more than a degree apart, record the temperatures.
After 45 minutes, the temperature of the sand sample was -1°C, the temperature of the 50-gram cold water sample was 0°C, and the temperature of the 100-gram cold water sample was 0°C.
What is temperature?
The experiment is testing the ability of different substances to retain or lose heat in a cold environment. By placing the sand and water samples in an ice water bath and checking their temperatures every 15 minutes, the experiment shows how long it takes for each substance to reach thermal equilibrium with the cold environment. The final temperatures of the samples after 45 minutes show that the sand reached a lower temperature than the water samples, indicating that it lost heat more quickly. This is because sand has a lower heat capacity than water, meaning it takes less energy to change its temperature. The two water samples reached the same temperature, demonstrating that the amount of water in a sample does not affect its ability to retain heat in a cold environment.
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How much force is needed to accelerate a 1000-kg car at a rate of 3 m/s2? a 1003 N b 0.003 N c 3000 N d 333.3 N
Answer:
Option c.
Explanation:
According to Newton's law, formula to solve this problem is:
F = m . a
Mass → 1000 kg
a → 3 m/s²
F = 1000 kg . 3m/s² → 3000 N
1 N = 1 kg . m/s² according to SI, Internation System of units.
the sum of the atomic mass values of the atoms in a chemical formula is known as ____________.
Answer:
I believe this is called the 'molar mass'
Beaker A contains 1 liter which is 25 percent oil and the rest is vinegar, thoroughly mixed up. Beaker B contains 2 liters which is 40 percent oil and the rest vinegar, completely mixed up. Half of the contents of B are poured into A, then completely mixed up. How much oil should now be added to A to produce a mixture which is 60 percent oil
0.15 liters of oil should be added to Beaker A to produce a mixture that is 60% oil.
Let's calculate the initial amounts of oil in Beakers A and B and then determine how much oil needs to be added to A to achieve a mixture that is 60% oil.
Beaker A initially contains 1 liter, with 25% oil. Therefore, the amount of oil in Beaker A is:
1 liter * 25% = 0.25 liters of oil.
Beaker B initially contains 2 liters, with 40% oil. Therefore, the amount of oil in Beaker B is:
2 liters * 40% = 0.8 liters of oil.
When half of the contents of Beaker B (1 liter) are poured into Beaker A, the total volume in Beaker A becomes 1 + 1 = 2 liters. The total amount of oil in Beaker A after mixing becomes:
0.25 liters (initial oil in A) + 0.8 liters (oil from B) = 1.05 liters of oil.
To achieve a mixture that is 60% oil, we need to calculate how much additional oil needs to be added to Beaker A.
Let x represent the amount of additional oil to be added in liters. The final mixture will have a total volume of 2 liters.
Therefore, the equation for the final mixture can be set up as:
(1.05 liters of oil + x liters of oil) / 2 liters (total volume) = 60% (0.6) oil.
Simplifying the equation:
1.05 + x = 0.6 * 2
1.05 + x = 1.2
x = 1.2 - 1.05
x = 0.15 liters
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Compared to 3.011 × 10²³ atoms of Na, 1.0 mole of Carbon
A. has the same number of atoms
B. has twice as many atoms
C. not enough information
D. has half as many atoms
Compared to 1.0 mole of H₂S (molar mass 334 g/mol), 1.0 mole of NH₃ (molar mass 17g/mol)
A. has half the number of molecules
B. not enough information
C. has twice the number of molecules
D. has the same number of molecules
Thank you!
1. B. has twice as many atoms
2. D. has the same number of molecules
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
1.
3.011 × 10²³ atoms of Na, 1.0 mole of Carbon
1 mole Carbon = 6.02.10²³ atoms, so 1 mole of Carbon B. has twice as many atoms of Na
2.
1.0 mole of H₂S (molar mass 334 g/mol), 1.0 mole of NH₃ (molar mass 17g/mol)
Both have the same number of moles, so they have the same number of molecules
1.0 mole of NH₃ D. has the same number of molecules as 1.0 mole of H₂S
Give the number of protons and the number of neutrons in the nucleus of the following isotopes: a) Carbon-14 b) Cobalt-60 c) Gold-197 d) Uranium-235
Explanation:
We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.
a) Carbon-14:
By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.
atomic number = n° of protons
mass number = n° of protons + n° of neutrons
n° of protons = atomic number
n° of neutrons = mass number - n° of protons
n° of neutrons = mass number - atomic number
If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.
In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.
n° of protons = atomic number = 6
n° of protons = 6
n° of neutrons = mass number - atomic number = 14 - 6
n° of neutrons = 8
b) Cobalt-60:
atomic number = 27 (from the periodic table)
mass number = 60
n° of protons = atomic number = 27
n° of protons = 27
n° of neutrons = mass number - atomic number = 60 - 27
n° of neutrons = 33
c) Gold-197:
atomic number = 79 (from the periodic table)
mass number = 197
n° of protons = atomic number = 79
n° of protons = 79
n° of neutrons = mass number - atomic number = 197 - 79
n° of neutrons = 118
d) Uranium-235:
atomic number = 92 (from the periodic table)
mass number = 235
n° of protons = atomic number = 92
n° of protons = 92
n° of neutrons = mass number - atomic number = 235 - 92
n° of neutrons = 143
Answer:
a) Carbon-14: n° of protons = 6 n° of neutrons = 8
b) Cobalt-60: n° of protons = 27 n° of neutrons = 33
c) Gold-197: n° of protons = 79 n° of neutrons = 118
d) Uranium-235: n° of protons = 92 n° of neutrons = 143
A process is used to chemically link smaller units to form a larger molecule that is made up of repeating units
The properties of the larger molecule are determined by the chemical structure and the order or bonding of
the smaller units.
The student is explaining
elimination.
hydrohalogenation.
polymerization.
substitution.
Polymerization because monomers are joined to form a larger molecule. These units are linked together with different types of bonds depending on the class of the molecule such as carbohydrates, lipids, or proteins.
Answer:
C
Explanation:
Polymerization
a solution of sodium bicarbonate is prepared by adding 45.00 g of sodium bicarbonate to a 1.00-l volumetric flask and adding distilled water until it reaches the 1.00-l mark. what is the concentration of sodium bicarbonate in units of (a) milligrams per liter, (b) molarity, (c) normality, and (d) milligrams per liter as caco3?
Concentration refers to the amount of substance present.
What is concentration?
The term concentration refers to the amount of substance present. There are many units that could be used for concentration of a solution. This makes reference easy.
To express the concentration in milligram per liter;
45/1000/1 L = 0.045 mg/L
To express the concentration in molarity;
Number of moles = mass/molar mass = 45.00 g /106 g/mol = 0.42 moles
Molarity = 0.42 moles/1 L = 0.42 M
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Charli is boiling a pot of water as she prepares dinner. The temperature at which the water boils can be explained by the external
pressure and
A
the amount of heat that is added to the pot of water.
B. the volume of the sample of water being heated.
C. the rate at which heat is added to the pot of water.
D
the strength of attractive forces among the water molecules.
PLEASE ANSWER QUICKLY THIS IS DUE IN 5 MINS!!
Answer:
ya tu sabes cómo se los aseguro
A gas is formed in the reaction shown below. The gas laws can help determine the volume of gas produced.
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction. To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used. What quantity in moles of Zn were used?
Considering the definition of molar mass, the number of moles of Zn reactant used is 2 moles.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Number of moles of Zn usedThe balanced reaction is:
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction.
To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used.
So to determine the number of moles used you know that the molar mass of Zn is 65.37\(\frac{g}{moles}\). Then:
\(molar mass=\frac{mass}{number of moles}\)
\(65.37\frac{g}{moles} =\frac{130.8 g}{number of moles}\)
Solving:
number of moles× 65.37\(\frac{g}{moles}\)= 130.8 g
\(number of moles=\frac{130.8 g}{65.37\frac{g}{moles}}\)
number of moles≅ 2 moles
Finally, the number of moles of Zn reactant used is 2 moles.
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How many grams are in 5.90 moles of C8H18?
Mass =672.6 g
Further explanationThe mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
\(\tt mol=\dfrac{mass}{MW}\)
MW = molecular weight
MW C₈H₁₈ = 8x12 + 18 x1 = 114 g/mol
mass:
\(\tt mass=mol\times MW\\\\mass=5.9\times 114=672.6~g\)
moderates weather so that highs and lows are less extreme
I need the factor of that
Moderates weather so that highs and lows are less extreme because of sea breeze motion.
Sea breeze are that as the warm air from the land is rising and the cooler air from the ocean is flowing over land and will replace the warmer air that is rising. in simple words , land gets warmer during the day than the water and the hot air rising up and cooler air move towards the land called as sea breeze. moderate weather is refers to that weather which is neither very cold nor very hot.
Thus, Moderate weather so that highs and lows are less extreme because of sea breeze motion.
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This is an unbalanced equation representing a chemical reaction HgO->Hg+O2 (two is supposed to be small and on the bottom right part of the O) Which equation is the correctly balanced chemical equation for this reaction? A. HgO->Hg+20 (and a tiny 2 next to the 20) B. 2Hgo->Hg+0 (and a tiny 2 next to the 0) C. 2HgO->2Hg+0 (and a tiny 2 next to the 0) D. 2Hgo->Hg+20 (and a tiny 2 next to the 20)
Answer: C. \(2HgO\rightarrow 2Hg+O_2\)
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The skeletal chemical equation will be:
\(HgO\rightarrow Hg+O_2\)
The balanced chemical equation will be:
\(2HgO\rightarrow 2Hg+O_2\)
The correctly balanced chemical equation for the reaction \(HgO - > Hg + O_{2}\) is: C. \(2HgO - > 2Hg + O_{2}\)
The law of conservation of mass states that mass can neither be created nor destroyed; it can only be transferred from one location to another. As a result, the mass of the products is required to be the same as the mass of the reactants.
On both the reactant and product sides of the reaction, the identical amount of atoms of each element is required. Therefore, the equations used in chemistry are balanced.
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a train that travels 100km for 2 hours
Answer:
The correct distance traveled by the train in 2 hours, if it travels at a speed of 100 km/h, would be 200 kilometers.
Explanation:
Answer:
traveled at a speed of 50mph
Explanation:
100/2 =50