Ch. 3 Stoichiometry

Is combustion a reversible reaction?

• Yes.
• No.

Tags

NGSS.HS-PS1-6

A compound that contains only carbon and hydrogen and that produces carbon dioxide and water when burned is called a(n)

• binary compound
• carbonate
• ionic compound
• hydrocarbon

Tags

NGSS.MS-PS1-1

The separation of ions in a mass spectrometer depends on :

• Only the charge of the ions
• Only the mass of ions
• The mass and thee charge of ions
• Only the velocity of the ions

What do you expect the molar mass to be for this element?

• 91.4 g/mol
• 90.0 g/mol
• 4 g/mol
• 50. g/mol

Tags

NGSS.HS-PS1-7

Identify the type of reaction of the following:
P₄ + 3 O₂ -> 2 P₂O₃

• Combustion/Synthesis
• Decomposition/Synthesis
• Double  Replacement
• Single Replacement

You are given the following percentages: 40.05% Sulfur and 59.95% Oxygen. Find the empirical formula for these elements. (keep two decimal places throughout calculations)

• SO

• SO₂

• SO₃

• SO₄

⁶³Cu is 69% of the naturally occurring isotope of Cu.  If only one other isotope is present for natural copper, what is it?

• ⁵⁹Cu
• ⁶⁵Cu
• ⁶¹Cu
• ⁶²Cu

2 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

Tags

NGSS.HS-PS1-7

What is the limiting reactant if 10 moles of NH₃  react  with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

• NH₃
• NO
• N₂
• water

Tags

NGSS.HS-PS1-7

How many molecules are there in 24.0 g of FeF₃?

• 2.68 x 10²⁴ molecules
• 3.29 x 10²³ molecules
• 1.28 x 10²³ molecules
• 1.76 x 10²¹ molecules

Tags

NGSS.HS-PS1-7