Prequiz: Chem121
Name:_____________________________
1. Fill in the blanks for the following element:
119
Sn
Number of protons______
Mass Number______
Number of electrons______
Atomic Number______
Number of neutrons______
Name of element__________________
2. What subatomic particle(s) are found in the nucleus of the atom?__________________
3. How many total atoms (or moles) are contained in the molecule ammonium nitride:
(NH4)3N
3. Calculate the Molar Mass for the molecule calcium hydroxide: Ca(OH)2
4. How many grams of potassium, chemical symbol, K are contained in 2.65 moles of
potassium?
5. How many atoms of chlorine, chemical symbol Cl, are in 17.40 grams of chlorine?
6. Bicarbonate of soda (sodium hydrogen carbonate) is used baking. Its formula is NaHCO 3.
Calculate the Mass Percent Composition (mass %) of Na (sodium) in sodium hydrogen
carbonate.