Chemistry Math Review

Determine the empirical formula for C₄H₈

• C₂H₄

• CH₂

• C₄H₈

• CH

Determine the empirical formula for Na₂C₂O₄

• Na₂C₂O₄

• Na₂CO₂

• NaCO₂

• Na₄C₄O₈

Determine the gram formula mass for Al₂(CO₃)₃

• 114 g

• 109 g

• 207 g

• 234 g

How many grams are in 0.750 moles of sodium hydroxide (NaOH/ gfm = 40 g)?

• 30 g

• 40 g

• 50 g

• 60 g

How many moles of water are in 2.00 grams of water (gfm = 18 g)?

• 2 mol

• 1 mol

• 0.5 mol

• 0.1 mol

How many moles are in 8.76 grams of sodium hydroxide (NaOH/ gfm = 40 g)?

• 1 mol

• 0.5 mol

• 0.2 mol

• 0.1 mol

How many grams are in 0.200 moles of H₂S?

• 40
• 34
• 36
• 50

Find the percentage composition of Mg in Mg₃(PO₄)₂.

• 27.48% Mg

• 43.11% Mg

• 16.00% Mg

• 12.63% Mg

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

What is the mass percentage of Carbon in Carbon dioxide (CO₂)?

• 27.27%

• 42.86%

• 72.73%

• 72.72%

Tags

NGSS.HS-PS1-7