Chemistry I - Chapter 3 Review
Atomic #
# of protons
Isotope
Atoms of the same element that have a different number of neutrons
0.00750 g Ag
Convert 0.0000695 mol of Ag to grams
31.92 g
Convert 0.1148 mol of PbCl2 into grams
15.5 g
Convert 0.266 mol of NaCl into grams
0.4635 mol
Convert 45.22 g of Cu(OH)2 into moles.
0.06376 mol
Convert 6.382 g of CaCO3 into moles.
40.08 g calcium
what is the mass of 1 mole of Ca
chlorine - 35
chlorine has 2 stable isotopes; chlorine - 35 & chlorine -37. Based on the average atomic mass of chlorine, which isotope is more abundant in nature.
2.65 g
convert 0.00474 mol of Fe to grams
0.500 mol
convert 11.5 g Na to moles
4.7 mol
convert 150 g S to moles
0.100 mol
convert 5.87 g Ni to moles
143.37 g
molar mass of AgCl
261.35 g
molar mass of Ba(NO3)2
37.05 g
molar mass of NH4F
386.94 g
molar mass of Rb2Cr2O7
tungsten - 184
p+: 74, e-: 74, n: 110 (what is the element and mass number?)
gold - 198
p+: 79, e-: 79, n: 119 (what is the element and mass number?)
Mass #
protons + neutrons
% abundance
ratio of stable isotopes on Earth
Mass Number & Neutrons
Isotopes vary by what 2 things?
Electron
Located in the electron cloud with a negative charge
Proton
Located in the nucleus with a positive charge
Neutron
Located in the nucleus with no charge
Nucleus
The small, dense, positively charged center of the atom.
manganese - 57
has 32 neutrons and 25 protons
bismuth
has 83 protons
vanadium - 51
has a mass number of 51 with 23 protons
6.02 x 10^23
how many atoms in one mole of something?
