Well i got assigned these chemistry questions today and i just cant seem to get them..so i thought what the heck ill post here....anyone think they can help...the questions are below.
1.A compound is composed of 14.4 g of carbon, 2.4 g of hydrogen, and 19.2 g of oxygen. The molar mass of the compound is 180 grams. Find the imperical and molecular formula for the compound.
2.Write the simplest formula for a compound that is 15.7 % carbon and 84.3 % sulfur and name the compound.
3.If 15.5 g of lead (II) nitrate are reacted with 3.81 g of sodium chloride then sodium nitrate and lead (II) chloride are formed:
a) which reactant is in excess?
b) calculate the mass of the excess
c) calculate the mass of lead (11) chloride produced
4.How many moles of iron atoms are needed to supply 3 times as many atoms as does 20 grams of calcium
so any chemistry Guru's wanna help a kid out?
THNX
Duggy
1.A compound is composed of 14.4 g of carbon, 2.4 g of hydrogen, and 19.2 g of oxygen. The molar mass of the compound is 180 grams. Find the imperical and molecular formula for the compound.
2.Write the simplest formula for a compound that is 15.7 % carbon and 84.3 % sulfur and name the compound.
3.If 15.5 g of lead (II) nitrate are reacted with 3.81 g of sodium chloride then sodium nitrate and lead (II) chloride are formed:
a) which reactant is in excess?
b) calculate the mass of the excess
c) calculate the mass of lead (11) chloride produced
4.How many moles of iron atoms are needed to supply 3 times as many atoms as does 20 grams of calcium
so any chemistry Guru's wanna help a kid out?
THNX
Duggy
