Nomenclature and Stoichiometry

What is the formula for phosphorous acid?

• H₃PO₄
• H₂PO₄
• H₃P
• H₃PO₃

What is the formula for nitric acid?

• HNO₂
• HNO₃
• HNO₄
• H₂NO₃

Tags

NGSS.HS-PS1-1

What is the name of FeSO₄?

• Iron Sulfite
• Iron (II) Sulfite
• Iron(IV) Sulfate
• Iron (II) Sulfate

what is the name of CCl₄?

• carbon tetrachloride
• monocarbon tetrachloride
• tetracarbon monochloride
• carbon chloride

calcium oxide

• Ca₂O₂
• Ca₂O
• CaO
• CaO₂

Tags

NGSS.HS-PS1-2

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

• 27.75% Mg
• 23.57% Mg
• 48.68% Mg
• 13.45% Mg

Tags

NGSS.HS-PS1-7

What is the percentage of chromium in K₂Cr₂O₇?

• 38.1%
• 27.2%
• 34.7%
• 100%

A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?

• MgCO₃ · 5H₂O
• MgCO₃ · 4H₂O
• MgCO₃ · 6H₂O
• MgCO₃ · 1H₂O

Tags

NGSS.HS-PS1-7

A hydrate of magnesium chloride is present and the following data is collected:
mass of crucible = 22.130 grams
mass of crucible + hydrate = 25.290 grams
mass of crucible and contents after heating = 23.491 grams
What is the complete formula of this hydrate?

• MgCl₂ · 7H₂O
• MgCl₂ · 11H₂O
• MgCl₂ · 6H₂O
• MgCl₂ · 13H₂O

Tags

NGSS.HS-PS1-7

Determine the amount of moles in 1.50 x 10²³ atoms of fluorine.

• 9.03 x 10⁴⁶ moles
• 0.249 moles
• 4.73 moles
• 0.0131 moles

Tags

NGSS.HS-PS1-7