Investigation 6 Exam

What is the molar mass of CO₂?

• 12 g/mol

• 16 g/mol

• 32 g/mol

• 44 g/mol

Which list of number of atoms in MgF₂ is right?

• Mg : 1--  F :  1
  
• Mg : 1 -- F :  2
  
• Mg :  2 --  F :   1
  
• Mg : 0 --   F :  1
  

Tags

NGSS.MS-PS1-1

What is the molar mass of AuCl₃?

• 96 g
• 130 g
• 232.5 g
• 303.3 g

The mass % of H in methane (CH₄) is:

• 75%

• 92%

• 25%

• 4%

• 6%

What is the molar mass of NaOH?

• 40 g/mol
• 38.989 g/mol
• 23.998 g/mol
• 57.004 g/mol

• 84g

• .8401g

• 84.01g

• 81.04g

Tags

NGSS.HS-PS1-7

What is the empirical formula of a substance with the molecular formula C₂H₄?

• C₂H₂

• C₂H₂

• C₁H₁

• CH₂

A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. What is the empirical formula?

• Mg₄N₃

• MgN₂

• Mg₃N₂

• MgN

Tags

NGSS.HS-PS1-1

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

• NaPO₂

• Na₂PO₃

• Na₃PO₄

• NaPO₄

A formula with the lowest whole # ratio of elements in a compound is called

• Molecular Formula
• Chemical Formula
• Empirical Formula 
• Distance Formula