Stoichiometry Gas

What is Avogadro's Number?

• 6.02 atoms

• 6.02 x 10²³ molecules

• 22.4 L/mole

• 6.02 x 10²³ particles/mole

Tags

NGSS.HS-PS1-7

When a question gives you moles and asks you to calculate mass, where do you find the mass to use?

• 22.4 grams

• Periodic Table

  grams

• Periodic Table

  grams/mole

• 6.02 x 10²³ grams

What's the volume of 51g of NH₃? M_r(NH₃) = 17 gmol^-1

• 72 dm³

• 3 dm³

• 51 dm³

• 153 dm³

• 91 dm³

Mg₃N_2(s) + 3H₂O_(l) ––> 3 MgO + 2NH_3(g)If 10.3 g of magnesium nitride is used, what volume of ammonia gas will be produced? M_r (Mg₃N₂) = 101gmol^-1

• 27.1 dm³ H₂

• 4.90 dm³ H₂

• 0.204 dm³ H₂

• 10.3 dm³ H₂

• 2.04 dm³ H₂

Tags

NGSS.HS-PS1-7

Calculate the mass of CO₂ formed from 1.2dm³ of CO. M_r (CO₂) = 44gmol^-1

• 2.2g CO₂

• 1.2g CO₂

• 1.05g CO₂

• 1.50g CO₂

• 2.4g CO₂

Tags

NGSS.HS-PS1-7

What volume of hydrogen will be produced from 67.3 g of magnesium? M_r(Mg) = 24.3 gmol^-1

• 66.5 dm³

• 65.6 dm³

• 132.9 dm³

• 73.5 dm³

• 113.5 dm³

CO has a volume of 120cm³. What's the mass of this gas? M_r(CO) = 28 gmol^-1

• 0.14g

• 140g

• 0.12g

• 120g

• 150g

Hydrogen gas and Oxygen gas can be combined to form water. The reaction is as follows:
2 H₂ + O₂ 🡪 2 H₂O

If we have 8 hydrogen atoms and 3 oxygen atoms, what element will we run out of first that will limit the amount of water that can be made?

• Hydrogen

• Oxygen

• Answer can not be determined with the information provided

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

2 H₂ + O₂ --> 2 H₂O

1 mole H₂ = 2 grams H₂ 1 mole O₂ = 32 grams O₂ 1 mole H₂O = 18 grams H₂O

The set up to calculate the number of grams of O₂ that can be made from 8 grams of H₂ is provided for you below.

What belongs in Box A?

• 1 mole H₂

• 2 mole H₂

• 18 mole H₂

Tags

NGSS.HS-PS1-7

N₂ + 3 H₂ --> 2 NH₃

Choose the correct set up to convert 36 L of NH₃ to L of H₂

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Tags

NGSS.HS-PS1-7