chem mastering

help needed on answers

1. How many atoms of H$H$ does the notation 5 Fe(CH3COO)3$Fe({CH}_{3}COO{)}_3$ indicate?

2. How many atoms of O$O$ does the notation 5 Fe(CH3COO)3$Fe({CH}_{3}COO{)}_3$ indicate?

Express your answer as an integer.

3.Consider the reaction for the combustion of isopropanol (C3H7OH$C_3{H}_{7}OH$, rubbing alcohol):

2C3H7OH+9O2 → 6CO2+8H2O

PART :How many moles of CO2${CO}_2$ are produced when 0.877 moles of isopropanol are burned?

Express your answer to three significant figures.

PART B:

How many moles of oxygen are required to burn 2.51 mol of isopropanol?

Express your answer to three significant figures.

4.What mass in grams of solute is needed to prepare 3.29 L$L$ of 0.410 M$M$ $HCl$?

5.What mass in grams of solute is needed to prepare 145 mL$mL$ of 0.450 M$M$ K2CrO4?

6.Toluene (C7H8$C_7{H}_8$) and nitric acid (HNO3${HNO}_3$) are used in the production of trinitrotoluene (TNT$TNT$, $C_7{H}_5{N}_3{O}_6$), an explosive.
C7H8+HNO3→C7H5N3O6+H2O$C_7{H}_8+{HNO}_3\to C_7{H}_5{N}_3{O}_6+H_{2}O$ (not balanced)

PART A: What mass in grams of nitric acid is required to react with 742 g$g$ C7H8$C_7{H}_8$?

PART B: What mass in grams of TNT can be made from 341 g$g$ C7H8$C_7{H}_8$?

7.What mass in grams of the magnetic oxide of iron (Fe3O4${Fe}_3{O}_4$) can be made from 48.0 g$g$ of pure iron and an excess

of oxygen? The equation is

Fe+O2→Fe3O4$Fe+O_2\to {Fe}_3{O}_4$ (not balanced)

8.What is the percent by volume concentration of 79.0 mL$mL$ of water in 777 mL$mL$ of an ethanol-water solution?

9. What is the percent by volume concentration of 73.8 mL$mL$ of acetone in 1200 mL$mL$ of an acetone-water solution?