Chemistry Review 3

What is the mole ratio of all the substances represented in this figure?

• 4:6:10

• 2:3:2

• 2:3:5

• 2:2:5

Tags

NGSS.HS-PS1-7

In a balanced chemical equation, the total number of moles of all the reactants is equal to the total number of moles of all the products.

• True

• False

Tags

NGSS.HS-PS1-7

How many particles are in 13.5 grams of Beryllium?

• 1.5 particles

• 9 particles

• 4x10^23 particles

In a chemical reaction represented by the general equation, there are four distinct mole ratios that can be written.

• True

• False

Tags

NGSS.HS-PS1-7

How many grams are in 7.8 moles of NaCl?

• 476 grams

• 460 grams

• 452 grams

• 462 grams

Which conversion factor will correctly complete this setup for finding the number of moles of O2 required to completely react with 75.0 grams of Sb? The balanced chemical equation for the reaction is shown:

• 1 mole/31.998 g O2

• 4 moles Sb/3 moles O2

• 3 moles O2/4 moles Sb

• 31.998g O2/1 mole

In a chemical reaction, the reactant with the largest molar mass is the limiting reagent.

• True

• False

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation

• Panic

• Write an Unbalanced Equation

• Ask for help

If you start with atoms of NaOH and are going to moles of NaOH, how many steps is it?

• 1

• 2

• 3

• 4

Gold is reacted with chlorine gas according to the reaction 2 Au + 3 Cl2 -> 2 AuCl3. Use the data in the table to determine the percent yield of gold chloride.

• 60.7 %

• 54.1 %

• 58.1 %

• 51.4 %

Tags

NGSS.HS-PS1-7