Chemistry Quiz 3
How many moles are there in 3.00 g of ethanol, CH3CH2OH?
0.0652 mol
How many anions are there in 2.50 g of MgBr2?
1.64 x 10^22 anions
How many moles of C8H18 contain 9.25 x 10^24 molecules of C8H18?
15.4 moles C8H18
What is the mass of 8.50 x 10^22 molecules of NH3?
2.40 g
What is the molar mass of nitrogen gas?
28.0 g/mol
What is the charge on the Sc ions in Sc2O3?
3+
How many Fe(II) ions are there in 20.0 g of FeSO4?
7.92 x 10^22 iron (II) ions
Write the formula for barium nitrite.
Ba(NO2)2
Write the formula for barium nitride.
Ba3N2
What is the empirical formula for C12H24O6?
C2H4O
The chemical formula for calcium nitride is
Ca3N2
Determine the name for Cl2O.
Dichlorine monoxide
What is the chemical formula for iron (III) sulfate?
Fe2(SO4)3
The chemical formula for nitrous acid is
HNO2(aq)
Which of the following exists as a diatomic molecule?
Hydrogen
The solid compound, K2SO4, contains
K+ and SO4^-2 ions
Identify the compound with ionic bonds.
KBr
Give the structure for lithium hypochlorite.
LICIO
The chemical formula for lithium peroxide is
Li2O2
What is the chemical formula for magnesium hydride?
MgH2
Which of the following exists as a polyatomic molecule?
Phosphorus
Give the name for PBr3.
Phosphorus tribromide
The chemical formula for the sulfite ion is
SO3^2-
Give the formula for stannous nitrate.
Sn(NO3)2
Write the name for Sr3(PO4)2.
Strontium phosphate