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