Answers
The number of moles of Ca(OH)2 formed is 4.33 moles.
Given,
number of moles of H₂O = 4.33
The balanced equation is :
CaO + H₂0 → Ca(OH)₂
From the balanced chemical reaction, we conclude that,
As 1 moles of H₂O react with 1 mole of Ca(OH)₂
Then, 4.33 moles of H₂O will react with 4.33 moles of H₂O.
Thus, the number of moles of Ca(OH)₂ formed will be 4.33 moles.
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Related Questions
Jade wants to see the effect of mechanical energy on the number of times a ball bounces. She drops the ball from three different heights (0.5 m, 1 m, and 1.5 m). If the ball bounced back 5 times from a 0.5 m height, which of the following is a possibility for how many times the ball bounces from a 1 m height? 3 times because the ball will have less mechanical energy 3 times because the ball will have more mechanical energy 8 times because the ball will have less mechanical energy 8 times because the ball will have more mechanical energy. LISTEN TO THE COMMENT
Answers
Answer:
3
Explanation:
A neutral atom of Cl-37 has
O 37 protons, 37 neutrons, and 37 electrons O 17 protons, 37 neutrons, and 17 electrons 17 protons, 20 neutrons, and 37 electrons 17 protons, 20 neutrons, and 17 electrons
Answers
Answer:
17 protons, 20 neutrons, and 17 electrons.
Explanation:
A periodic table can be defined as the standard arrangement of chemical elements by atomic number, electronic configuration and chemical properties in a tabular form.
Generally, a proper representation of the mass number and atomic number of chemical elements is key and very important in chemistry.
Furthermore, as a rule, it should be noted that the mass number (nucleon number) is always larger than the atomic number(number of proton).
The mass number of this neutral atom of Cl-37 is 37 and we know that the atomic number (number of protons) of chlorine is 17. Also, the atomic number of an element is equal to the number of its electrons.
A neutral atom of Cl-37 has 17 protons, 20 neutrons, and 17 electrons.
Hence, a neutral atom of Cl-37 can be identified based on its number of protons because it represent its atomic number, which is what is used to differentiate an atom of an element from the atom of another chemical element.
The figure below shows a walkway with a handrail. Angle is the angle between the walkway and the horizontal, while angle is the angle between the vertical posts of the handrail and the walkway. Use the figure below to work the problem. (Assume that the vertical posts are perpendicular to the horizontal.)
Are angles and complementary or supplementary angles?
complementary
supplementary
Answers
The angles as shown are supplementary angles because the add up to 180 degrees.
What are supplementary angles?Two angles are said to be supplementary if they add up to 180 degrees. Now we know that the sum of angles on straight line is 180 degrees. If we look at the image as shown in the image attached, we can see that the angles lie on a straight line.
As such, we can conclude that the angles as shown are supplementary angles because the add up to 180 degrees.
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Not a timed or graded assignment. I’m in a time crunch so Quick answer = amazing review :)
Answers
Answer:
\(13.6\text{ g}\)Explanation:
Here, we want to get the mass of zinc (ii) chloride to be produced
From the balanced equation of chemical reaction, we can see that:
1 mole of zinc produced 1 mole of zinc (ii) chloride
Now, let us get the number of moles of zinc that reacted actually
To get this, we have to divide the mass of zinc reacted by the atomic mass of zinc
The atomic mass of zinc is 65 amu
Thus, the number of moles of zinc that reacted will be:
\(\frac{6.5}{65}\text{ = 0.1 mole}\)Since the number of moles of both is equal theoretically, it means that the number of moles of zinc (ii) chloride produced will be 0.1 mole too
To get the mass of zinc (ii) chloride produced, we have to multiply the number of moles produced by the molar mass of zinc (ii) chloride
The molar mass of zinc (ii) chloride is 136 g/mol
Thus, we have the mass, produced as:
\(136\text{ }\times\text{ 0.1 = 13.6 g}\)32.14 mL of a 0.05 M sulfuric acid (H2SO4) solution are required to neutralise 25 mL of a sodium hydroxide (NaOH) solution.
What is the concentration (in mol L-1) of SO42- ions in the final solution?
Answers
The concentration of SO42- ions in the final solution is 0.01 mol L-1.
The neutralisation reaction between sulfuric acid (H2SO4) and sodium hydroxide (NaOH) requires the use of a chemical equation that is balanced:
H2SO4 + NaOH = Na2SO4 + 2H2O
We may deduce from the balanced equation that one mole of H2SO4 reacts with one mole of Na2SO4, meaning that the amount of SO42- ions produced is equal to the amount of H2SO4 utilised.
We may determine how many moles of H2SO4 were used by calculating the amount of 0.05 M H2SO4 solution needed to neutralise 25 mL of NaOH solution:
H2SO4 moles are equal to the product of the volume of H2SO4 (in L) and the concentration of H2SO4 (in mol L-1): 0.03214 L 0.05 mol L-1 = 0.001607 mol
The formation of SO42- ions results in the same amount of moles as the
The resulting solution contains the following amounts of SO42- ions per mole of H2SO4 used:
Moles of SO42- ions/volume of solution (in L) = 0.001607 mol/(0.025 L + 0.03214 L) = 0.01 mol L-1; concentration of SO42- ions (in mol L-1)
As a result, the final solution contains 0.01 mol L-1 of SO42- ions.
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What is rent? A. The amount you spend on needs each month B. The amount you pay to purchase a house C. The amount you pay to live in a space such as an apartment D. The amount you pay for electricity and water
Answers
Which solution between molecular compounds denoted alkane and alkene, can be analyzed using a UV/Vis spectrophotometer? Explain.
Answers
Answer:
UV/Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of different analytes, such as transition metal ions, highly conjugated organic compounds, and certain biological macromolecules. Measurement is usually carried out in solution.
Explanation:
if a 45.2 g sample of nickel is heated up to 640°C and is dropped into a 100.0 g sample of water originally at 25°C will the sample of water boil? prove it by setting up two q=cmT expressions one for water and one for nickel side by side
Answers
The water would not boil becuse the final temperature is 52.8°C.
Would the water boil?We know that the heat that has been lost by the nickel would be equal to the heat that has been gained by the water. In this case, we can see that;
q = mcdT
q = Heat that is lost or gained
m = mass of substance
c = Specific heat capacity
dT = temperature change
Then we have;
45.2 * 0.44J/g∘C * (640 - T) = 100 * 4.2 * (T - 25)
12736 - 19.9T = 420T - 10500
12736 + 10500 = 420T + 19.9T
23236 = 439.9T
T = 23236 /439.9
T = 52.8°C
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Is anyone good at chemistry if so can someone please help me NO LINKS PLEASE
Answers
Answer:
1. Mass of New atom = 208
2. Atomic number of the new atom is 82
3. Symbol of the new atom is Pb
Explanation:
²¹²₈₄Po —> ⁴₂He + ᴬZX
1. Determination of the mass A of the new atom.
212 = 4 + A
Collect like terms
212 – 4 = A
208 = A
A = 208
Therefore, the mass of the new atom is 208
2. Determination of the atomic number of the new atom.
84 = 2 + Z
Collect like terms
84 – 2 = Z
82 = Z
Z = 82
Therefore, the atomic number of the new atom is 82
3. Determination of symbol of the new atom
The atomic number of the new atom is 82. Comparing the atomic number of the new atom (i.e 82) with those in the periodic table, the new atom is Lead.
Lead has a symbol of Pb
Thus,
Mass of new atom (A) = 208
Atomic number of new atom (Z) = 82
Symbol of new atom (X) = Pb
Therefore,
ᴬZX = ²⁰⁸₈₂Pb
Which diagram shows the relationship between volume and pressure for a gas at constant temperature?
Answers
Pressure and volume have an indirectly proportional relationship
Explanation:Ideal gas laws can help us describe the relationship between different values for gases.
Boyle's Law
The ideal gas law that connects pressure and volume given a constant temperature is Boyle's law. Boyle's law is represented as:
P₁V₁ = P₂V₂This equation shows that pressure and volume have an indirectly proportional relationship. This means that as pressure increases, volume decreases and vice versa. So, pressure and increase opposite of each other.
Indirect Relationships
Indirect relationships occur when one value and the reciprocal of another are proportional. For example, pressure and 1/volume are directly proportional. This function looks like a decreasing exponential function. Attached is an example of a volume vs. pressure graph.
please help me i will give brain list
Answers
Answer:
a. pentane = C5H12
b. Heptane = C7H16
c. Hexyne = C6H10
d. Octene = C8H16
e. Nonane = C9H20
Hope it helps.
1-pentene
Molecular Formula C5H10
Condensed Structural FormulaCH2=CH(CH2)2CH3
Melting Point (°C)–138
Boiling Point (°C)30
2- heptane is the straight-chain alkane with the chemical formula H3C(CH2)5CH3 or C7H16, and is one of the main components of gasoline (petrol).
I would calculate the number of protons by?
Answers
Answer:
The number of proton in an atom is equal to the atomic number of that element. Thus, Number of protons = Atomic number ( Z )
Explain please thank you <33
Diego argues that what is happening is just a physical change of the water in the flask boiling to produce water vapor, which is filling the cylinder. A classmate believes differently and hypothesizes that a chemical reaction has occurred. Provide evidence for the classmate's hypothesis.
Answers
The evidence for the classmate's hypothesis of it being a chemical reaction is the presence of the bubbles.
What is Effervescence?This is also referred to as fizzing and it is characterized by the release of gases from a solid or liquid substance thereby resulting in the formation of bubbles.
Chemical change on the other hand occurs when a new substance is formed as a result of the chemical composition being changed. The chemical change which was hypothesized by the classmate may be true as a result of the bubbles seen in the water which is therefore the most appropriate choice.
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The interior of an incandescent light bulb is at about 610 mm hg. What is the pressure in a lightbulb in atmospheres
Answers
Answer:0.802atm
Explanation:
To convert pressure from millimeters of mercury (mmHg) to atmospheres (atm), you can use the conversion factor:
1 atm = 760 mmHg
So, to convert the pressure of the light bulb from mmHg to atm, divide the given pressure by 760:
Pressure (in atm) = 610 mmHg / 760 mmHg
Pressure (in atm) ≈ 0.802 atm
Therefore, the pressure inside the light bulb is approximately 0.802 atmosphe
7) How many molecules of CO2 are in 2.5 L at STP?
Answers
By using the ideal gas law and Avogadro's number, we find that there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.
To determine the number of molecules of CO2 in 2.5 L at STP (Standard Temperature and Pressure), we can use the ideal gas law and Avogadro's number.
Avogadro's number (N_A) is a fundamental constant representing the number of particles (atoms, molecules, ions) in one mole of substance. Its value is approximately 6.022 × 10^23 particles/mol.
STP conditions are defined as a temperature of 273.15 K (0 °C) and a pressure of 1 atmosphere (1 atm).
First, we need to convert the volume from liters to moles of CO2. To do this, we use the ideal gas law equation:
PV = nRT,
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Since we have STP conditions, we can substitute the values:
(1 atm) × (2.5 L) = n × (0.0821 L·atm/(mol·K)) × (273.15 K).
Simplifying the equation:
2.5 = n × 22.4149.
Solving for n (the number of moles):
n = 2.5 / 22.4149 ≈ 0.1116 moles.
Next, we can calculate the number of molecules using Avogadro's number:
Number of molecules = n × N_A.
Number of molecules = 0.1116 moles × (6.022 × 10^23 particles/mol).
Number of molecules ≈ 6.72 × 10^22 molecules.
Therefore, there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.
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What are space stations used for?
Answers
Answer:
lt serves as a home where crews of astronauts and cosmonauts live. The space station is also a unique science laboratory. Several nations worked together to build and use the space station. The space station is made of parts that were assembled in space by astronauts.
Explanation:
Stamples of heterogeneous equilibria. FeO(s) + CO(g) = Fe(s) + CO₂(g) II. H₂(g) L₂(g) = 2HI(g) III. CO₂(g) + C(s) = 2CO(g) IV. N₂(g) 3H₂(g) + 2NH3(g) Identify I.
Answers
An example of heterogeneous equilibrium is:
I. FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g)What is heterogeneous equilibrium?Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.
Considering the given equations:
The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.
This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.
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What is the reaction rate?
2 mg/s
0
4 mg/s
O
8 mg/s
Answers
The reaction rate is the amount of a substance that is being reacted (or produced) over a certain period of time.
What is substance?Substance is a term used to refer to a material or a substance that has mass and occupies space. It can also refer to a type of material that has unique properties and characteristics. It includes both tangible and intangible things such as liquids, solids, gases, and energy. It is a fundamental concept in chemistry and physics and is used to describe the physical properties of matter. For example, water is a substance composed of two hydrogen atoms and one oxygen atom. It has a distinct chemical formula and can be classified as a liquid at room temperature. Substance is also used in a more philosophical sense to refer to the underlying principles that compose a thing or idea.
Therefore, the reaction rate cannot be determined from the information provided.
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In general, what happens to the rate of reaction when you decrease the
temperature of a chemical reaction? *
It decreases
It increases
It is unaffected
It increases, and then decreases
Answers
Answer:
It decreases
Explanation:
Temperature change has a considerable effect on reaction rates since temperature is directly proportional to the average kinetic energy of reacting particles.
Since temperature is directly proportional to reaction rates, if the temperature is increased, the reaction rate also increases.
If the temperature rate decreases, the reaction rate also decreases.
Generally for every 10°C rise in temperature above room temperature, it has been found that reaction rates become double or triple.
The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 1.7 cm by 3.0 cm by 12.9 cm.
Answers
Answer: 177.23 g.
Explanation:
the volume of the aluminum bar is
1.7 cm x 3.0 cm x 12.9 cm
= 65.61 cm^3
2.7 g/cm^3 x 65.61 cm^3
177.23g
WHERE can you find the formula for density?
Answers
Answer:
The formula for density is mass divided by volume
Explanation:
hope this helps!!!
To help you remember draw D= and a heart, erase the middle of the heart and you’ll see it’s an M and a V
Also draw a triangle and draw a horizontal line down the middle on top of the line write “M” draw a vertical line under the horizontal line and in the left put D and right put V. If you want to figure out volume cover the V and you’ll see you need to divide M (mass) by D (density) and it’s very helpful!
Cell membranes contain channels that allow ions to cross the phospholipid bilayer. Suppose that a particular potassium channel carries a current of 1. 8 pa. How many potassium ions ( k+ ) pass through it in 1. 0 ms ?.
Answers
To solve this problem, we need to use the equation:
I = nq/t
where I is the current, n is the number of ions, q is the charge on one ion, and t is the time.
We can rearrange this equation to solve for n:
n = It/q
First, we need to convert 1.8 pa to amperes (A):
1.8 pa = 1.8 x 10^-12 A
The charge on one K+ ion is +1.6 x 10^-19 C.
Now we can plug in the values:
n = (1.8 x 10^-12 A)(1.0 x 10^-3 s) / (1.6 x 10^-19 C)
n = 1.125 x 10^7 ions
Therefore, 1.125 x 10^7 K+ ions pass through the channel in 1.0 ms.
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A sample of 9.51g of a salt is dissolved in 100g of water at 21.0°C. As the sodium hydroxide dissolves, the temperature of the water increases to 48.5°C. How much energy was released by dissolving the salt? The specific heat of water is 4.18J/g°C.
A. 426,000 joules
B. 11,495 joules
C. 418 joules
D. 8778 joules
Answers
Energy was released by dissolving the salt. Correct answer is A.
In salts for which the hydration energy is known to be higher than the lattice energy, solvation occurs with a release of energy in the form of heat. For example, (anhydrous calcium chloride) heats the water when dissolving. However, for instance, the hexahydrate, cools the water upon dissolution.
Write the balanced reaction for the dissolution of each salt in water, including physical states .The convention is to leave water out of the equation, and simply write the reactant as the solid ionic compound and the product as ions in aqueous solution. Below is an example of a reaction for the dissolution of an ionic compound in water.
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Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment. (2)
Answers
It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.
In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.
During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.
The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.
However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.
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In Universe L, recently discovered by an intrepid team of chemists who also happen to have studied interdimensional travel, quantum mechanics works just as it does in our universe, except that there are eight d orbitals instead of the usual number we observe here. Use these facts to write the ground-state electron configurations of the seventh and eighth elements in the first transition series in Universe L.
Answers
Answer:
See explanation
Explanation:
The seventh transition element is Cobalt and the eight transition element is nickel.
Since there are eight d orbitals, we have to write the electronic configuration of Cobalt as;
[Ar] 3d9 4s0
For Nickel, we can write;
[Ar] 3d10 4s0
Note that the eight d orbitals can accommodate 16 electrons.
What is it called when instead of getting rid of a product you find another
use for the product?
Answers
Answer:
Recycling.
Explanation:
When instead of getting rid of a product you find another use for the product, it is called recycling.
Recycling can be defined as a process which typically involves gathering, processing and transformation of materials or products that would otherwise be gotten rid of as waste materials or trash into new products that could be used for another purpose.
Basically, the recycling process involves turning a trash or unwanted product into a treasure (new product) that is capable of serving another purpose.
For example, the crown cork of a bottle could be gathered and processed into art forms that can be used for decorations.
Theses are all the points
I have left
Would you rather Go to jail for the rest of your life or go to prison for the rest of you life?
Answers
Thanks for the points!!! ( ^ω^ )
Answer:
I honestly don't know but I hope you get more points! ;D
Explanation:
How many formula units are in 32.4 g of aluminum hydroxide
Answers
Answer:
here are 2.50 x 10^23 formula units in 32.4 g of aluminum hydroxide.
Explanation:
The molar mass of aluminum hydroxide (Al(OH)3) is 78.0 g/mol.
To determine the number of formula units in 32.4 g of aluminum hydroxide, we first need to calculate the number of moles of aluminum hydroxide in 32.4 g:
moles of Al(OH)3 = mass / molar mass
moles of Al(OH)3 = 32.4 g / 78.0 g/mol
moles of Al(OH)3 = 0.415 mol
Next, we use Avogadro's number to convert the number of moles to the number of formula units:
number of formula units = moles of Al(OH)3 x Avogadro's number
number of formula units = 0.415 mol x 6.022 x 10^23/mol
number of formula units = 2.50 x 10^23 formula units
Therefore, there are 2.50 x 10^23 formula units in 32.4 g of aluminum hydroxide.
If the atomic number of an element is 6 and its mass number is 14, how many neutrons are contained in the nucleus?
Answers
Answer:
8
Explanation:
because 14 - 6 is 8
H2O2 can be used as a disinfectant; it decomposes as: 2 H2O2 → 2 H2O + O2
If the rate of disappearance of H2O2 is 0.038 Ms–1, what is the rate of appearance of O2 in Ms-1?
Enter your answer to 3 decimal places. Do not include units. Make sure to round correctly
Answers
We are given a balanced chemical equation and the rate of O² appearance (0.0014 M/s) in the inquiry.
We may easily multiply the mole ratio by the rate of disappearance of H²O² to obtain the rate of disappearance. As a result, the rate at which disappears is 0.0028 M/s.
Does the disappearance rate always go downhill?The rate of disappearance for reactants is a positive (+) value. Because goods are being made rather than vanishing, their rate of disappearance (-) is negative. Reactants are vanishing rather than being generated, hence their rate of formation is a negative (-) value.
The rate of disappearance may be defined as the speed at which a reactant dissipates after being consumed in the course of the reaction. Four moles of nitric oxide and six moles of water are produced in the reaction above when one mole of sulphur dioxide and one mole of ammonia are combined.
A response always happens at a positive pace.
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