Stoichiometry Mass and Mole Calculations

Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced? 
3AgNO₃  + Na₃(PO₄)  --->  Ag₃(PO₄)  + 3NaNO₃

• 164 g

• 64 g

• 146 g

• 164 moles

Tags

NGSS.HS-PS1-7

The limiting reactant . . .

• slows the reaction down.

• is used up first.

• is the reactant that is left over.

• controls the speed of the reaction.

When does a chemical reaction stop?

• When the lab is finished.

• When the excess reactant is used. up

• When the limiting reactant is used up.

• Chemical reactions never stop.

When you use a balanced chemical equation to calculate the amount of a product on paper it is referred to as the 

• experimental value

• theoretical value

• true amount

• percent yield

Tags

NGSS.HS-PS1-7

Calculate the number of atoms in 0.0340 g Zn.

• 5.20 x 10^-4 atoms Zn

• 3.13 x 10²³ atoms Zn

• 3.13 x 10²⁰ atoms Zn

• 2.05 x 10²² atoms Zn

How many grams are in 3.30 mol of potassium sulfide?

• 363 g

• 454 g

• 238 g

• 132 g

Tags

NGSS.HS-PS1-7

Which of the following dimensional analysis setups will correctly convert 4.00x10²³atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

• setup B : 0.664 mol Co

• setup A: 2.41x10⁴⁷mol Co

• setup A : 0.664 mol Co

• setup B: 2.41x10⁴⁷mol Co

Calculate the number of moles in 3.13 x 10²⁰ atoms Zn.

• x 10⁴⁴ mol Zn

• 5.2 x 10^-4 mol Zn

• 2.53 x 10⁵ mol Zn

• 2.05 x 10^-4 mol Zn

Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?

• A

• B

• C

• D