Stoichiometry mole to mole

What is the definition of stoichiometry?

• The measurement of temperature changes in a system

• The process of photosynthesis in plants

• Calculation of reactants and products in chemical reactions based on the law of conservation of mass.

• The study of stars and galaxies

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NGSS.HS-PS1-7

How many particles are in one mole of a substance?

• 6.022 x 10^24 particles

• 6.022 x 10^22 particles

• 6.022 x 10^25 particles

• 6.022 x 10^23 particles

What is Avogadro's number?

• Approximately 5.022 x 10^23

• Approximately 6.022 x 10^23

• Around 7.022 x 10^23

• Exactly 6.022 x 10^22

In a balanced chemical equation, what do the coefficients represent?

• The coefficients represent the speed of the reaction.

• The coefficients represent the temperature of the reaction.

• The coefficients represent the stoichiometry of the reaction.

• The coefficients represent the color of the reactants.

What is the mole ratio between H2 and O2 in the reaction 2H2 + O2 -> 2H2O?

• 4:2

• 1:2

• 2:1

• 3:1

Tags

NGSS.HS-PS1-7

If you have 2 moles of H2, how many moles of O2 are needed to react completely?

• 2

• 3

• 4

• 1

Tags

NGSS.HS-PS1-7

What is the mole ratio between Na and Cl in the reaction 2Na + Cl2 -> 2NaCl?

• 3:1

• 4:2

• 1:2

• 2:1

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NGSS.HS-PS1-7

• 3

• 4

• 1.5

• 2.5

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NGSS.HS-PS1-7

What is the mole ratio between Fe and O2 in the reaction 4Fe + 3O2 -> 2Fe2O3?

• 2:3

• 1:2

• 4:3

• 3:4

Tags

NGSS.HS-PS1-7

If you have 5 moles of Fe, how many moles of O2 are needed to react completely?

• 3.75

• 2.5

• 6.8

• 4.2

Tags

NGSS.HS-PS1-7