16.What is the mass of 3.00 mol of calcium?
a. 3.00 g
b. 9.00 g
c. 40.1 g
d. 120 g
17.What is the mass of 4.00 moles of Fe?
a. 4.00 g
b. 55.85 g
c. 223 g
d. None of the above
18.What is the mass of 2.00 moles of H2O(l)?
a. 18.0 g
b. 36.0 g
c. 24.0 g
d. None of the above
19.How many moles of carbon dioxide are in 440.1 g of CO2(g)?
a. 10 moles
b. 440.1 moles
c. 44.01 moles
d. 0.10 moles
2006-11-14 12:31:02 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help
16 d
17 c
18 b
19 a
1 mole of an atomic mass unit = 1 g.
Actually it mostly defined as 1 mole of C12 = 12 g.
2006-11-14 12:36:33 · answer #1 · answered by feanor 7 · 0⤊ 0⤋
okay for mass you take the amount of the element in moles and mulitiple it but the molar mass of the element so on Ca you would take 3 and multiple it by40 to get 120 for Fe you would take 4 and muiltiple it by55.78 which you woulf gt 223.12 so 223 works mass of the next one wouls be 2 multiplied by 18 to get 36 then for the last one you would change equations440.1 divided by its molar mass which is 44 to get 10
2006-11-14 20:50:46 · answer #2 · answered by angel_babydoll_devil08 2 · 0⤊ 0⤋
Pay better attention in class
2006-11-14 20:33:10 · answer #3 · answered by Anonymous · 0⤊ 1⤋