EXAM REVIEW
WHAT IS THE FIRST ELEMENT IN THE PERIODIC TABLE?
a. Nitrogenb.Uraniumc.Hydrogend.Oxygen
TRUE OR FALSE: AN ELECTRON CARRIES A POSITIVE CHARGE
a. Trueb.False
WHAT IS THE CHEMICAL SYMBOL FOR SILVER?
a.Sib.Agc.Aud.Sv
WHAT IS THE ATOMIC MASS OF POTASSIUM?
a. 12.011gb. 15.99gc. 39.0
WHAT IS H20 MORE COMMONLY KNOWN AS?
a.Waterb.Hydrogen Peroxidec.Acid
TRUE OR FALSE: THIS EQUATION IS BALANCED: C + O2 CO2
a. Trueb. False
AS ELEMENTS MOVE DOWN THE PERIODIC TABLE, AND ACROSS THE PERIODIC TABLE, WHAT HAPPENS TO THE
ATOMIC MASS?
a.Nothingb.It gets smallerc.It stays the samed.It gets bigger
Calculate the mass of 3.71 x 1026 atoms of silver.
A6.65 * 104 g
B 4.00 * 1028 g
C 2.07 * 1048 g
D6.16 * 102 g
E none of these
WHAT IS THE MOLAR MASS OF NITROGLYCERIN, C3H5(NO3)3?
A) 179 g/mol
B) 227 g/mol
C) 199 g/mol
D) 185 g/mol
E) none of these
1.25 G OF CA REPRESENTS HOW MANY MOLES?
A) 32.1 mol
B) 5.01 * 101 mol
C) 7.54 * 1023 mol
D) 0.0312 mol
E) none of these
3.78 MOLES OF WATER WEIGHS
A) 2.10 * 10–1 g
B) 68.1 g
C) 4.77 g
D) 21.9 g
E) 73.8 g
HOW MANY ATOMS ARE THERE IN 81.4 G OF NICKEL?
A) 1.39
B) 4.78 * 103 C) 8.35 * 1023
D) 4.90 * 1025
E) none of these
FIND THE PERCENT COMPOSITION OF: CuBr2
FIND THE PERCENT COMPOSITION OF: NaOH
FIND THE PERCENT COMPOSITION OF: (NH4)2S
75% CARBON, 25% HYDROGEN
52.7% POTASSIUM, 47.3% CHLORINE
22.1% ALUMINUM, 25.4% PHOSPHORUS, 52.5% OXYGEN
13% MAGNESIUM, 87% BROMINE