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?