Stoich Test

Equation: 4 Na + O2 --> 2Na2O How many moles of of Na2O is produced by the reaction of 46 g of Na?

• .500 mol

• 1.50 mol

• 2.00 mol

• 1.00 mol

CS2 + 3 O2 ---> CO2 + 2 SO2 How many moles carbon dioxide are produced if you start with 5.0mol CS2?

• 5

• 10

• 15

• 2.5

Tags

NGSS.HS-PS1-7

Look at the following equation. How many moles of HCl are produced from 2 moles of H2?

H2 + CL2 --> 2HCl

• 4 mols HCl

• 3 mols HCl

• 2 mols HCl

• no correct answer

Tags

NGSS.HS-PS1-7

The molar mass is the mass of one_______ of a substance.

• mole

• atomic unit

• liter

• gram

Tags

NGSS.HS-PS1-7

How many grams are in 0.02 moles of beryllium iodide, BeI2?

• 5.26 g

• 2.45 g

• 4.58 g

• 7.892 g

Tags

NGSS.HS-PS1-7

B2H6 + 3O2 -->2 HBO2 + 2 H2O

What mass of O2 will be needed to burn 28.0 g of B2H6?

• 64.0 g O2

• 96.0 g O2

• 32.0 mol O2

• 32 g O2

Tags

NGSS.HS-PS1-7

Use the following equation: NaIO3(aq) + 6HI(aq) --> 3I2(s) + NaI(aq) + 3H2O(l)

How many moles of iodine can be made from 6.00 moles of NaIO3?

• 24.0 moles I2

• 18.0 moles I2

• 1.0 moles I2

• 3 moles I2

NH₃ has what molar mass?

• 17.04 g/mole

• 20.07 g/mole

• 15.02 g/mole

• 34.08 g/mole

N2 + 3H2 −-> 2NH3 How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6

• 3

• 2

• 1

Lactic Acid builds up in your muscles when you over exert them, causing a burning sensation. What is the mass (grams) of one mole of this compound if the formula is C₃H6O₃?

• 90.09 g

• 29.02g

• 87.06g

• 144.15g