Moles and Stoichiometry

When the following equation is balanced what is the SUM of the coefficients:
___ K3PO4 +___ HCl ---> _____   KCl + ____  H3PO4

Tags

NGSS.HS-PS1-7

Calculate the gram formula mass of Ba(OH)₂•8H₂O (Round answer to the tenth place and only put the number)

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4

• 4:6

• 1:3

• 3:1

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

Tags

NGSS.HS-PS1-7

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol

• 1.0 mol

• 10.1 mol

• 4.5 mol

Tags

NGSS.HS-PS1-7

True or False. You must convert grams to moles to do stoichiometry.

• True

• False

Tags

NGSS.HS-PS1-7

NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

How many molecules are in 1 mole of CO₂?

• 4.6 molecules

• 4.6 grams

• 6.02 x 10 ²³ molecules

• 1.806x 10 ²⁴ atoms

What is stoichiometry?

• The study of how the quantities of reactants and products are related in chemical reactions

• The study of the speed of reactions

• The study of how chemical reactions occur

• The study of types of reactions

Given the equation: 2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g) 2.00 moles of NaClO₃ will produce how many grams of O₂? (mass of O₂ = 32g/mol)

• 56 g of O₂

• 96 g of O₂

• 64 g O₂

• 32 g O₂

Tags

NGSS.HS-PS1-7