Answer:
4.03 g
Explanation:
The mass in grams of the hydrogen gas is 4.0 g
StoichiometryFrom the question,
We are to determine the mass in grams of the hydrogen gas.
First, we will determine the number of moles of hydrogen gas present.
Using the formula,
[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]
From the given information,
Number of hydrogen molecules = 1.204 × 10²⁴ molecules
Thus,
Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]
Number of moles of hydrogen gas present = 2 moles
Now, for the mass of the hydrogen gas
Using the formula,
Mass = Number of moles × Molar mass
Molar mass of hydrogen gas = 2.016 g/mol
Then,
Mass of the hydrogen gas = 2 × 2.016
Mass of the hydrogen gas = 4.032 g
Mass of the hydrogen gas ≅ 4.0 g
Hence, the mass in grams of the hydrogen gas is 4.0 g
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do all energy transfers lead to a phase change
Answer: Fusion, vaporization, and sublimation are endothermic processes, whereas freezing, condensation, and deposition are exothermic processes. Changes of state are examples of phase changes, or phase transitions. All phase changes are accompanied by changes in the energy of a system
Explanation:
Why the bond in water molecule os polar covalent bond, while than in chlorine molecule is pure covalent bond? Give reason?
Explanation:
The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.
2. How many carbon atoms would be in 2 MOLES of carbon?
Answer:
In one mole of carbon , there are 6.02 × 1023 atoms. so in two moles , there will be twice that = 1.204× 1024.
Suppose you add water to 6 g of sugar to make a solution with a concentration of 3 g/l What is the total volume of the solution?
Answer:
no
Explanation:
I have a chemistry writing promp but it’s asking questions here the prompt: What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen? State three potential molecular formulas from the empirical formula in A. If the molecular formula mass in A is 760 grams/mol, what is the molecular formula? WIll the molecular and empirical formulas in A and D have the same characteristics? Why or why not?
Explanation:
1. Find the empirical formula of a compound that has 36.84% of Nitrogen (N), 63.16% of Oxygen (O).
Secondly, Find molar mass of each component: N=14.0067, O=15.9994
Thirdly, convert to moles: N=2.6301698472874, O=3.9476480368014
Then find smallest mole value: 2.6301698472874
Divide all components my smallest value: N=1, O=1.5009099282591
Then divide by fractional component of each mole value: N=1.9963668986866, O=2.9963668986866
Round to closest whole numbers: N=2, O=3
Lastly, combine to get the empirical formula:N2O3
if answered correctly i will give brainlest
Answer: Earthquake location
Explanation:
Answer:
Volcano chains and arcs, and earthquake locations
Which of the following samples of baking soda wold react the fastest with
vinegar? *
1 point
powder
they all react at the same rate
O small crystal
small cube
1. What is WRONG with the setup used by the student to solve this
problem?
10 points
If 53.8 grams of Aluminum Carbide is treated with Sodium Oxide, how many moles of Aluminum Oxide is
produced?
AlqC3 +6 Na2O + 2 Al2O3 + 3 Nand
53.8 g ALC
1 mole ALC
2 mole Al2O3
101.96g Al2O3
143.92 g AL C3
1 mole ALC
1 mole Al2O3
The student used the wrong mole ratio.
O The student is solving for the wrong unit.
Ο Ο Ο
The student used incorrect steps.
The student's setup is correct.
INITI
Answer:
Trump or biden or obama or soba or you or beach
Which statement describes the differences between chemical reactions and nuclear decay rates? Chemical reaction rates vary, but nuclear decay rates are constant. Both chemical reaction rates and nuclear decay rates vary. Nuclear decay rates vary, but chemical reaction rates are constant.
Answer:
Answer the last one Nuclear decay rates vary, but chemical reaction rates are constant
Explanation:
Correct me if im wrong
Answer:
Chemical reaction rates vary, but nuclear decay rates are constant.
Explanation:
gradepoint
What are some potential traits that are needed to become a super athlete?
Answer: Confidence, strength, potential
Explanation:
[tex] \huge \boxed{ \fcolorbox{black}{pink}{Answer}}[/tex]
20 Distinguishing Personality Traits of High-Performing Athletes
1. Self Confidence. “Self-Confidence” isn't just a phrase for cheesy motivational posters. ...
2. Strong Sense of Motivation. It takes more than a shiny medal or hefty check to motivate the world's best athletes. ...
3. Inner Desire to Succeed. ...
4. Natural Goal Setter. ...
5. Self-Discipline. ...
6. Optimism. ...
7. Sense of Belonging. ...
8. Natural Leader.
Need help ASAP please and thank you
PLEASE HELP ASAP!!! WILL MARK BRAINLIEST!!!! 25 POINTS!!!!! IF YOU"RE JUST GOING TO ANSWER FOR POINTS PLEASE DO NOT I NEED REAL ANSWERS!!!!
2. Which gas law is this experiment investigating? How does your graph represent the gas law under investigation?
3. Using your knowledge of the kinetic molecular theory of gases, describe the relationship between volume and temperature of an ideal gas. Explain how this is reflected in your lab data.
4. Pressure and number of moles remained constant during this experiment. If you wanted to test one of these variables in a future experiment, how would you use your knowledge of gas laws to set up the investigation?
Answer:
2. for number two I asks what the experiment is showing, I need the picture of the experiment.
3. As temperature increases, the particles will gain kinetic energy causing it to move more rapidly and randomly. However, this causes the gas to expand as the particles will have more energy to roam freely. as temperature increases, Volume increases.
4. Im not sure D:
What is true of all mixtures?
Group of answer choices
All mixtures are made up of 2 or more elements or compounds.
All mixtures are made up of solutions
All mixtures are made up of compounds.
All mixtures are made up of elements.
Answer:
Answer the first ine made up of 2 or more.....
All mixtures are made up of two or more elements or compounds.
What are compounds?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Does pure water conduct electricity? if not, what can we do to make it conducting?
Explanation:
Pure water does not conduct electricity. This is because pure water do not contain any salts. Pure water can conduct electricity when common salt is added to it, as salt solution is conducting in nature.
Please help me on this.
Answer: true
Explanation:
i hope this helps
Sulfuric acid is an important chemical in industrial production of many products. In the “old” days, it was called oil of vitriol. It is commonly dyed brown now to alert people to its hazards because it is hugely corrosive. It is commonly found in car batteries. What is the molarity of 25.9 moles of sulfuric acid dissolved in 4.00 L of solution?
Answer:
6.475 M
Explanation:
Number of moles = 25.9 moles
Volume = 4.00 L
Molarity = ?
The relationship between the quantities is given as;
Molarity = Number of moles / Volume
Molarity = 25.9 / 4
Molarity = 6.475 M
How many moles of O are in 12.6 mol Fe(NO3)3?
The answer is 113.4, rounded is 113
Explanation: Just multiply 12.6 mol Fe(NO3)3 by 9 ( 9 is the number of O atoms in the equation)
Answer: There are 113 moles of O in 12.6 moles of [tex]Fe(NO_3)_3[/tex]
Explanation:
Given : moles of [tex]Fe(NO_3)_3[/tex] = 113.4
To find : moles of O = ?
1 mole of [tex]Fe(NO_3)_3[/tex] contains = 9 moles of O atoms
Thus 12.6 mole of [tex]Fe(NO_3)_3[/tex] contains = [tex]\frac{9}{1}\times 12.6=113.4[/tex] moles of O atoms
Thus there are 113 moles of O in 12.6 moles of [tex]Fe(NO_3)_3[/tex]
In the future the universe will most likely
Answer:A
Explanation: The universe is always expanding at all times. It dosnt expand that much though, very little
In a chemical reaction*
1 point
The atoms of the reactants unbond, rearrange, and then rebond to form the products
Some atoms disappear while others multiply to form the products
The atoms of the reactants always stay together to form the products
New atoms are formed which combine to make the products
Answer:
1st one is correct
The atom of the reactants unbound , rearrange, and then rebond to form the product
hope it helps
In a chemical reaction, the atoms of the reactants unbond, rearrange, and then rebond to form the products. Therefore, option A is correct.
What is chemical reaction ?Chemical reaction, the transformation of one or more chemicals the reactants into one or more distinct compounds, the products. Chemical elements or chemical compounds make up substances.
Combustion reaction, decomposition reaction, neutralization reaction, redox reaction, precipitation or double-displacement reaction, and synthesis reaction are some of the numerous types of reactions.
In a chemical reaction, bonds between molecules of the reactant are broken and new bonds between molecules of the product are established to create a new substance.
A chemical equation is nothing more than a mathematical statement that represents how reactants form products.
Thus, option A is correct.
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Write the equilibrium expressions for each of the following equilibria:
a. 2 Ba + O2 ⇌ 2 BaO
b. 2 Mg + O2 ⇌ 2MgO
c. P4 + 5 O2 ⇌ P4O10
Answer:
a.
[tex]K=\frac{[BaO]^2}{[Ba]^2[O_2]}[/tex]
b.
[tex]K=\frac{[MgO]^2}{[Mg]^2[O_2]}[/tex]
c.
[tex]K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}[/tex]
Explanation:
Hello!
In this case, since the equilibrium expression is set up by dividing the products over the reactants and powering to the stoichiometric coefficient, we can proceed as follows:
a. 2 Ba + O2 ⇌ 2 BaO.
[tex]K=\frac{[BaO]^2}{[Ba]^2[O_2]}[/tex]
b. 2 Mg + O2 ⇌ 2MgO
[tex]K=\frac{[MgO]^2}{[Mg]^2[O_2]}[/tex]
c. P4 + 5 O2 ⇌ P4O10
[tex]K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}[/tex]
Best regards.
What happens to particles of a substance as its temperature increases?
A the average kinetic energy increases
B the average kinetic energy decreases
C the average kinetic energy stays the same
D nothing happens
Answer:
A. the average kinetic energy increases
Explanation:
temperature is a measure of the average kinetic energy of the particles in a sample of matter
PLZ HELP WILL BRAINLIEST
Balance the following equation: Fe2(SO4)3 + KOH --> K2SO4 + Fe(OH)3
Write the coefficients that you decide to balance the equation like this 3, 4, 3. If you do not add a coefficient in front of an element or compound, use a 1 in your answer. For instance the for this balanced equation: 2H2 + O2 --> 2H2O you would write your answer: 2, 1, 2
Answer:
6,3,2
Explanation:
Fe2(SO4)3 + 6 KOH = 3 K2SO4 + 2 Fe(OH)3
Which of the following factors would affect the rate at which the stages of death happen
A.Humidity
B.Temperature
C.If the person was sick
D.All of the choice would affect the rate
what is computer hardware in short?
Answer:
computer hardware is a collection of a physical part of a computer system
examples = CPU , monitor , mouse etc
HELP WITH A THESIS STATEMENT
I basically need a thesis statement on how DNA analysis relates to chemistry. The only problem is that I'm having trouble making it 'arguable'. My ideas were:
-DNA analysis relates to chemistry because it applies that knowledge when analyzing the DNA samples left at crime scenes in order to identify the suspect.
-DNA analysis relates to chemistry because it's a subcategory of chemistry, also known as forensic chemistry, where DNA left at crime scenes is analyzed to potentially link a suspect to a crime.
Do either of these sound good and are they arguable? If not can you reword it to be?
The second thesis statement is perfect. It supports the claim and presents main idea.
5. What is characteristic of an opaque object.
On the periodic table, what is a group? For the main groups, what characteristic
do the elements have in common?
Answer:
The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.
Explanation:
On the periodic table, a group refers to a vertical column of elements that share similar chemical properties.
For the main groups, the characteristic do the elements have in common is valence electron configuration and chemical reactivity.
On the periodic table, a group refers to a vertical column of elements that share similar chemical properties. These elements are arranged in such a way that they have the same number of valence electrons, which are the electrons in the outermost energy level (shell) of their atoms. The number of valence electrons is a critical factor in determining the chemical behavior and reactivity of elements, as it governs their ability to form chemical bonds with other elements.
Main group elements, also known as representative elements, are located in the s-block and p-block of the periodic table. These elements are found in Groups 1, 2, and 13 to 18. Each main group is labeled with a number from 1 to 18.
Here are the main characteristics that elements in the same main group (vertical column) have in common:
1. Valence Electron Configuration: Elements in the same main group have identical valence electron configurations. For example, elements in Group 1 (alkali metals) all have one valence electron in their outermost energy level (ns¹), while elements in Group 18 (noble gases) have a full outermost energy level.
2. Chemical Reactivity: Due to their identical valence electron configuration, elements in the same group show similar chemical reactivity. They tend to form similar types of chemical bonds and react similarly with other elements to achieve a more stable electron configuration.
3. Periodic Trends: Main group elements within a group exhibit predictable trends in their physical and chemical properties as you move from the top to the bottom of the group. For example, the atomic radius tends to increase, ionization energy tends to decrease, and metallic character tends to increase as you go down a group.
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Which substances are most likely acids? Check all that apply. CH4, HI, NH3, HNO3, NaCI
How many moles of I2 are in 8.23 moles of NaI ?
Answer: 4.12
Explanation:
we know that the given mol is 8.23 mol and they are 2NaI and I2 so we will write the equation like this.
8.23mol NaI x 1mol of I2 ÷ 2molNaI = 4.115≅ 4.12 mol of I2
we placed NaI at the bottom to cancel out with the 8.23 mol of NaI
Help! Please:(
Given the following chemical equation, how many grams of water are created when 50.0 grams of oxygen react with excess hydrogen ?
2H2 + O2 - -> 2H20
Answer:
About 56.3 grams of H2O
Explanation: