The number of Hydrogen atoms = 6 atoms
Further explanationGiven
Reaction
N₂ + 3H₂ ⇒ 2NH₃
Required
The number of Hydrogen atoms
Solution
The reaction coefficient of a chemical equation shows the mole ratio of the reacting compound.
On a compound the reaction coefficient indicates the number of molecules
Whereas the subscript after the atom shows the number of atoms in that compound
Product from the reaction : 2NH₃
Number of H-atoms :
= 2 x 3
= 6 atoms
What is a neutralization reaction?
➢ A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products.
➢In a neutralization reaction, there is a combination of H+ ions and OH– ions which form water. A neutralisation reaction is generally an acid-base neutralization reaction.
Neutralization Reaction Equation:-
Acid + Base(alkali) → Salt + WaterNeutralization Reaction Examples:-
Formation of Sodium Chloride (Common Salt): HCl + NaOH → NaCl + H2OTitration methods using phenolphthalein.________________________________
Answer: A reaction that removes essentially all H+ and OH-
Explanation:
Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain
Answer:
lungs
Explanation:
A student made a sketch of a potential energy diagram to represent a reaction with a -^H
Explain, using complete sentences, why the diagram made by the student is correct or incorrect. Be sure to also explain
what the values of X and Y represent.
Answer: It’s correct because it’s showing an exothermic reaction. x is the reactants and y is the products.
Explanation: -ΔH means the reaction is exothermic and releasing heat. This lowers the potential energy.
Answer:
answer above is correct
Explanation:
How many moles are in 6.21x1025 atoms of magnesium oxide?
Answer: 55.56 moles of MgO
Explanation:
1 mole = avogadro number
if 6.21x10^25 atoms then molecules of MgO (equal numbers of Mg and O atoms)
= 0.5*6.21x10^25 = 3.105 molecules of MgO
So moles of MgO = 0.5*6.21*10^25/avogadro number = 55.56
In Part 1 of this chapter, you learned that USP Chapter <797> has established guidelines for how
often and under what circumstances a detailed hood-cleaning procedure must be performed. With
that in mind, what do these strict regulations indicate about the importance of hood cleaning to
patient health and safety?
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The strict regulations established by USP Chapter <797> regarding hood-cleaning procedures indicate the critical importance of hood cleaning to patient health and safety.
What is hood cleaning?The purpose of these guidelines is to ensure that compounding pharmacies maintain a clean and sterile environment when preparing medications, especially those that will be administered to patients. The guidelines specify the frequency of cleaning and the level of detail required to ensure that the hoods are free of contaminants, which could compromise the quality and efficacy of the compounded products.
Therefore, Failure to comply with these regulations could result in contamination of medications and subsequent harm to patients. Thus, it is crucial to adhere to these guidelines to maintain a safe and sterile environment for compounding medications.
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Which factor causes Earth’s seasons?
Answer:
The sun's position near earth
Explanation:
How many kJ of heat do you need to raise the temperature of 200 g of Aluminum from 80 °C to 100 °C?
Remember to convert your answer to kJ. Round your answer to two decimal places.
Answer:
0.01
Explanation:
100 -80=20
200/20=10/1000=0.01kj
What is the ratio of the concentration of acetic acid and acetate ions required to prepare a buffer with pH 5.20. The pKa of acetic acid is 4.76
Acetic acid has a 4.76 pH value. In order to create a buffer with a pH of 5.20, it is necessary to have a ratio of 2.75 of acetic acid and acetate ions.
In chemical, what is concentration?The amount of a substance's solute in a specific amount of solution is how concentrated it is. Molarity, or the number of moles of solute in one liter of solution, is a common unit of measurement for concentrations.
How much concentration do you have?Since the Great Salt Lake has a high concentration of salt, there aren't many fish there. A high concentration of a material in a solution simply implies that there is a lot of it there in relation to the volume. It signifies you pay attention properly to state that you have high focus skills.
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Why does it mean by methane molecule is symmetrical?
A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.
Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.
Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.
Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.
Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.
The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.
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Calculate the number of moles of NaCl contained in .5000 L of a 1.5 M (Molarity) solution.
Answer:
The number of moles of NaCl contained in 0.5000 L of a 1.5 M (Molarity) solution is 0.75 moles.
Explanation:
Molar concentration is a measure of the concentration of a solute in a solution, be it some molecular, ionic, or atomic species.
Molarity M is the number of moles of solute that are dissolved in a given volume.
The Molarity of a solution is determined by the following expression:
\(Molarity=\frac{number of moles of solute}{volume}\)
Molarity is expressed in units \(\frac{moles}{liter}\).
In this case:
Molarity= 1.5 Mnumber of moles of solute= ?volume= 0.5 LReemplacing:
\(1.5 M=\frac{number of moles of solute}{0.5 L}\)
Solving:
number of moles of solute= 1.5 M* 0.5 L
number of moles of solute= 0.75
The number of moles of NaCl contained in 0.5000 L of a 1.5 M (Molarity) solution is 0.75 moles.
how many elements are in Li2SO4?how many elements are in li2s 04 how many elements are in li2s 04
Answer:
3
Explanation:
the three elements involved in this compound are Li, S, O.
lithium, sulfur, and oxygen. Which create the ionic compound, "Lithium Sulfate."
7 atoms total, since there are two lithium, four oxygen, and one sulfate atom. this is a white inorganic salt.
There are three different types of elements in LiSO₄ which are lithium (Li), sulfur (S), and oxygen (O).
What is an element?
An element is a pure substance made of only one kind of atom which all have the same number of protons in their nuclei.
The chemical element was first presented by Robert Boyle who defined it as "incapable of decomposition”. Boyle’s this definition lies admirably close to present-day theory.
When different kinds of elements undergo particular chemical reactions then atoms are rearranged into new compounds connected together by chemical bonds.
All other naturally occurring elements occur on the Earth as compounds or mixtures. Air is a mixture of the elements nitrogen (N₂), oxygen (O), and argon (Ar), though it does contain carbon dioxide and water.
Given compound, lithium sulfate is formed of LiSO₄ has elements lithium, sulfur, and oxygen.
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A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?
a
(5,3), (6,2), (1,-2)
b
(6,0), (9,-3), (-6,-15)
c
(2/3,0), (1,-1/3), (-2/3,-5/3)
d
(-1,-3), (0,-4), (-5,-8)
A piece of metal is heated to 250 degrees then placed in a bucket of water with an initial temperature of 15 degrees. After 10 minutes, the system reaches a point of thermal equilibrium. The water is now 22 degrees. Which of the following is the most likely temperature of the piece of metal?
Answer: 22 degrees
Explanation:
Most of the information in this question is put there to throw you off- the only important piece of information here is the final temperature of the water.
In a system of say 2, like in this example, whichever object has more energy in the form of heat will transfer that heat to the object with lesser heat if there is an available path to transfer heat between them. Once the two objects are at the same temperature, however, heat can not be transferred from one to another since neither object has more heat than the other to transfer- this is thermal equilibrium.
This question tells us that the system is at thermal equilibrium- when both objects are at the same temperature. Given the temperature of one object, the water, we then know the other object, the metal is the same temperature.
The whole series of reactions is summarized by the following equation.
4H → He + 2e+ + 2ve
Calculate the energy, in MeV, that is released.
nuclear mass of He = 4.00150 u
Mass of H¹ = 1.00723
[Ans: 24.7 MeV]
The energy released in the nuclear reaction of 4H → He + 2e+ + 2ve is 2.224 MeV.
Understanding how to solve for energy in nuclear reactionRecall that the mass-energy equivalence formula,
E=mc²
We need to convert the masses from atomic mass units (u) to kilograms (kg) first, and then multiply by the speed of light squared (c²) in units of meters per second.
The change in mass between the reactants and products is:
Δm = (4.00150 u - 4 x 1.00723 u) x 1.66054 x 10⁻²⁷kg/u
= 0.02916 kg
where we have used the conversion factor 1 u = 1.66054 x 10⁻²⁷kg/u
The energy released is then:
E = Δm x c² / (1.60218 x 10⁻¹³ MeV/J)
= 0.02916 kg x (299792458 m/s)² / (1.60218 x 10⁻¹³ MeV/J)
= 2.224 MeV
Therefore, the energy released in this nuclear reaction is 2.224 MeV.
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Gas Laws
Pre-Test Active
1
2 3
5
6
O final pressure
O atmospheric pressure
O combined pressure
O partial pressure
7 8
9
10
A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide,
oxygen, and nitrogen. Which term most likely describes what she is measuring?
The term that the scientist would use in this case is partial pressure. Option D
What is the partial pressure?
The pressure that one particular gas component within a mixture of gases exerts is referred to as partial pressure. It is the pressure that the gas would experience at the same temperature if it were the only thing in the entire volume.
When researching gas mixtures, such as in gas laws, gas phase equilibria, and gas collecting methods, partial pressures are extremely crucial for the gas.
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which formula represents a nonpolar molecule ch4 hcl h2o nh3
A molecule whose charge distribution is spherically symmetric when averaged over time is known as a nonpolar molecule. As the charges of nonpolar molecule oscillates, a temporary dipole moment exists at any given instant in a so-called nonpolar molecule.
CH₄ is methane.
HCl is hydrochloric acid.
H₂O is water.
NH₃ is ammonia.
Properties of nonpolar molecule:
Physical State: Nonpolar molecules are mainly existing as gases and less existence as liquids.
Nature: Nonpolar molecules are very soft in nature.
Solubility: Nonpolar molecules are insoluble in water or less soluble in water. ...
Conductivity: Nonpolar molecules are insulators since they have no chargeable particles.
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You want to determine the concentration of a phosphoric acid (H3PO4) solution using a standardized 0.0995 M NaOH solution. 10.00 mL of the H3PO4 solution needed to be titrated with 22.85 mL of the standardized 0.0995M NaOH solution to reach the equivalence point. What is the concentration of the H3PO4 solution
Answer:
Explanation:
H₃PO₄ + 3NaOH = Na₃PO₄ + 3 H₂O.
1 mole 3 mole
22.85 mL of the standardized 0.0995M NaOH solution will contain
.0995 x .02285 moles of NaOH
= 22.7357 x 10⁻⁴ moles of NaOH
3 moles of NaOH reacts with 1 mole of H₃PO₄
22.7357 x 10⁻⁴ moles of NaOH reacts with 1 x 22.7357 x 10⁻⁴ / 3 mole of H₃PO₄
= 7.5785 x 10⁻⁴ moles of H₃PO₄
7.5785 x 10⁻⁴ moles of H₃PO₄ is contained in 10 mL or 10⁻² L
molarity of H₃PO₄ solution = 7.5785 x 10⁻⁴ / 10⁻²
= 7.58 x 10⁻² M
= .0758 M .
How does the specific heat of water affect the oceans?
A. It keeps the ocean temperatures more even.
B. It causes the rise and fall of tidewater.
C. It keeps the ocean water from freezing.
D. It increases the conductivity of seawater.
The specific heat capacity of water is 4.18 J/g*C which is on the high side, this implies that it will take a high amount of heat for water to get heated sufficiently.
A. It keeps the ocean temperatures more even.
Heat capacity of waterThe heat capacity of a substance can be defined as the quantity of heat needed to raise a unit mass of that substance by a unit change in its temperature
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Answer: A
Explanation:
i just took the test and got it right
calculate the moles of 25.2 g Na2S2O8
Answer:
To calculate the moles we must first find the molar mass M
M (Na2S2O8) = (23*2) + (32*2) + (16*8)
= 46 + 64 + 168
= 278g/mol
Molar mass = mass/moles
moles =mass / molar mass
= 25.2/278
= 0.0906mol
Hope this helps.
Choose the option that would convert mg/L
into molarity (mol/L).
A. Convert mg/L to get g/L then multiply by the volume (L).
B Convert mg/L to g/L then divide by molar
mass (g/mol).
C. Convert mg/L to g/L then divide by the volume (L).
D. Convert mg/L to g/L then divide by the
number of moles (mol).
The correct option that would convert mg/L into molarity (mol/L)- Convert mg/L to get g/L then multiply by the volume (L). so, option (a) is correct.
What is molarity ?
The amount of solute in one mole per liter of solution is known as molarity. For instance, when table salt is dissolved in water, the solute is salt, and the solution is water. 58.44 grams make up one mole of sodium chloride. One molar solution, often known as 1M, is created when 58.44 grams of sodium chloride are dissolved in one liter of water.
What is volume ?
Volume, a three-dimensional quantity, is used to calculate the capacity of a solid shape. It suggests that the volume of a closed figure determines the amount of three-dimensional space it can occupy.
Therefore, the correct option that would convert mg/L into molarity (mol/L)- Convert mg/L to get g/L then multiply by the volume (L). so, option (a) is correct.
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Answer: Not A, its B
Explanation: B
34.1 mg NaCl in 117.3 mL of solution
The molarity of the solution will be 4.97 M.
What is molarity?It is the number of moles of solutes per 1 liter of solvent or solution.
Mole of 34.1 g NaCl = 34.1/58.44 = 0.5835 mol
117.3 mL = 117.3/1000 = 0.1173 L
Molarity of the solution = 0.5835/0.1173 = 4.97 M
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Liquid octane (CH3(CH2)6CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O). Suppose 17. g of octane is mixed with 112. g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to significant digits.
The maximum mass of water that could be produced by the chemical reaction is 162 g.
The given chemical equation is: 2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(l)In the chemical reaction of liquid octane with gaseous oxygen, the products are gaseous carbon dioxide and gaseous water.According to the balanced chemical equation, 2 moles of C8H18 react with 25 moles of O2 to form 18 moles of H2O.So, 1 mole of C8H18 react with 25/2 = 12.5 moles of O2 to form 9 moles of H2O.The molar mass of C8H18 is 114 g/mol. So, the number of moles in 17 g of C8H18 is:17 g / 114 g/mol = 0.149 molThe molar mass of O2 is 32 g/mol. So, the number of moles in 112 g of O2 is:112 g / 32 g/mol = 3.5 molFrom the balanced chemical equation, 1 mole of C8H18 react with 12.5 moles of O2 to form 9 moles of H2O.So, the number of moles of O2 required to react with 0.149 mol of C8H18 to form H2O is:(12.5 mol / 1 mol) × (0.149 mol / 2 mol) = 0.935 molThe maximum number of moles of H2O that can be produced from 0.149 mol of C8H18 and 0.935 mol of O2 is 9 mol.So, the mass of water produced from 17 g of C8H18 and 112 g of O2 is:9 mol × 18 g/mol = 162 g
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WILL GIVE BRAINLIEST!!!!! - The diagram below shows the movement of Earth plates.
Which of these features is most likely formed as a result of the movement of Earth plates shown in the diagram?
A - A Mountain
B - A Canyon
C - A Fault
D - A Ridge
Answer:
A a mountain
Explanation:
this is becuase the two plates are pushing into each other, so all that rock will go where theres the least resistance, up
you can see this when you place your hands (palms down facing each other where the tis touch) on a table or flat surface, if you slowly bring them together ((DONT DO IT HARD OR FAST else u may hurt urself)) your fingertips will begin to want to rise up
the answer is not B becuase:
a canyon is formed when erosion carves into the earth, this oes NOT need to happen at a fault line and deffinitally does not happen n converging plates as shown
the answer is not D becuase:
a ridge is formed when ne plate pushes under the other, pushing that second plate upward, when this happens it forms a chain of mountains, though this is simmilar to the correct answer, the diagram does not show the plates undernieth one another, rather they are pushing against each other
the answer is not C becuase:
a fault is where two plates are moving away from each other, creating a canyon like structure, this is not a canyon however, for it is not formed by erosion, most faults can be found underwater since oceans usually fill in the gap where rock used to be
hope this helps you, sorry if its a lot of reading ^^"
Multiple Choice
Which of the following statements explain how
this experiment relates to the cycling of
matter?
Elodea uses water and carbon dioxide to
produce glucose and oxygen. The snail
uses glucose and oxygen and produces
water and carbon dioxide.
Elodea uses light, oxygen and water to
produce glucose. The snail eats the
elodea and releases carbon dioxide as a
waste product
The snail performs photosynthesis which
C releases carbon dioxide into the
atmosphere.
Nitrogen-fixing bacteria remove ammonia
D from the testube and increases dissolved
oxygen.
Answer:
Explanation:
B
What are the 3 types of chemical reactions?
Answer:
Synthesis reactions. Decomposition reactions. Combustion reactions.
Explanation:
Synthesis reactions. - Two or more reactants combine to make 1 new product
Decomposition reactions. - A single reactant breaks down to form 2 or more products.
Combustion reactions. - A single element or compound combines with oxygen gas releasing energy. This rapid oxidation is called burning.
The name of an oxyacid has the suffix -ous acid. What is the suffix of the oxyanion?
Answer:
-ate
Explanation:
1 Given that the density of CO₂ at the temperatures we used is 1.25 g/L, calculate the theoretical
and actual yield (based on the amount of sodium acetate produced!) for CO2, in liters, for the
experiment.
нсо
2 How many grams of sodium hydrogen carbonate would be necessary to produce 425 mL of CO₂?.
Use the density of CO2 from
1.596 grams of sodium hydrogen carbonate would be necessary to produce 425 mL of \(CO_{2}\) at STP.
To calculate the amount of sodium hydrogen carbonate needed to produce 425 mL of \(CO_{2}\), you can use the following steps:
Convert the volume of \(CO_{2}\) to moles using the molar volume at STP:
425 mL ÷ 1000 mL/L = 0.425 L \(CO_{2}\)
0.425 L \(CO_{2}\) ÷ 22.4 L/mol = 0.019 moles \(CO_{2}\)
Use the balanced chemical equation to determine the stoichiometry between sodium acetate and carbon di oxide:
\(NaC_{2} H_{3} O_{2}\) \(+ H_{2} O + CO_{2}\) → \(Na HC_{3} O_{2}\)\(+ CH_{3} COOH\)
For every 1 mole of sodium acetate, 1 mole of CO2 is produced. Therefore,
0.019 moles CO2 = 0.019 moles \(NaC_{2} H_{3} O_{2}\)
Calculate the mass of sodium hydrogen carbonate needed using its molar mass:
0.019 moles \(NaC_{2} H_{3} O_{2}\) × 84.01 g/mol = 1.596 g \(Na HC_{3} O_{2}\)
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In three to five sentences, predict the bonding activity between Carbon and Chlorine. Explain why they would bond that way in terms of electronegativity and valence electrons.
Answer:
Carbon has 4 valence electrons and Chlorine has 7 valence electrons. The bonding between the atoms is due to electronegativity difference. The electronegativity of carbon is 2.5 compared to chlorine which is 3.1, so they will bond by sharing the electron pair (valance electron) from each atom in a covalent bond. In addition, Carbon is more electronegative than Chlorine, which means that it takes less energy to remove an electron from Carbon than from Chlorine. This makes it easier for the electrons to be shared between them (since there is less energy required to share an electron).
Explanation:
HELP ASAP PLEASE ANSWER BOTH OF THESE QUESTIONS! I WILL GIVE YOU BRAINELIST IF YOU ANSWER IT!
Answer:
because it absorbs all colours expect for red,
Explanation: making the red light bounce into your eyes, therefore seeing the colour red
Question 2: The wave transfers its energy to the mineral, I think, thats my best guess
A tuna swam at a constant velocity of 1.2 meters per second toward a smaller fish. If the tuna swam toward the smaller fish for 7.0 seconds, how far did the tuna swim?
Write your answer to the tenths place!!!!
The tuna fish that swam at a constant velocity of 1.2 meters per second toward a smaller fish in 7 seconds swam 8.4m.
How to calculate distance?The distance moved by a moving body can be calculated by multiplying the speed by the time taken as follows:
Distance = speed × time
According to this question, a tuna swam at a constant velocity of 1.2 meters per second toward a smaller fish. If the tuna swam toward the smaller fish for 7.0 seconds, the distance is calculated as follows:
Distance = 1.2m/s × 7s
Distance = 8.4m
Therefore, the tuna fish that swam at a constant velocity of 1.2 meters per second toward a smaller fish in 7 seconds swam 8.4m.
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Answer:
i think u have to mutiply but i might be confused
i think the answer is 8.4 im not sure tho
Explanation: