Nomenclature
NaCl
Sodium Chloride
How many sig. figs. are in 760
2 significant digits
What many grams are in 1 mol of Oxygen?
molar mass O = 16.00 g/mol
16.00g
Is LiCl soluble?
YES
Group 1 element + chlorides (Cl-) are soluble
Lithium Ion + Chloride Ion
Li+ + Cl- =
LiCl
Ba(SO4)
Barium Sulfate
How many sig. figs. are in 0.0320
There are 3 significant digits
How many mol are in 12.01g of Carbon?
molar mass C = 12.01 g/mol
1 mol Carbon
Is NaNO3 soluble?
YES
Group 1 element + nitrates (NO3-) are soluble
Rubidium Ion + Cyanide
Rb+ + CN- =
RbCN
P4O10
tetraphosphorus decoxide
How many significant digits are in 670.
3 significant digits
How many mol are in 120.24g of Ca?
Molar mass Ca = 40.08 g/mol
3 mol Ca
Is S(NH4)2 soluble?
YES
ammonium (NH4) compounds are soluble
Potassium + Phosphate
3K+ + PO43- =
K3PO4
Co(ClO-)2
Cobalt (II) hypochlorite
What is the answer (with sig. figs.)?
234.740 + 32.6 = ?
267.3
1 decimal place
For addition and subtraction, the answer should have the same amount of decimal places as the given value with the least amount of decimal places.
How many mol are in 6.022*1023 molecules of Silicon?
NA: 1 mol = 6.022*1023 atoms/molecules
1 mol of Silicon
Is AgCl soluble?
NO
AgCl is an exception for the Cl- solubility rule
Iron (III) + Bromide Ion
Fe3+ + 3Br- =
FeBr3
CH3COONa
Sodium Acetate
What is the answer (with correct sig. figs.)?
(23.789 + 94.6)/(45.90-12.8) =
(23.789 + 94.6)/(45.90-12.8) =
1 decimal places 1 decimal place
118.389/33.10 = 3.577
1 decimal place, 4 sig. figs.
3.6 (answer rounded to one decimal place)
How many grams are in 4.8176*1024 atoms of Boron?
NA: 1 mol = 6.022*1023 atoms/molecules
(4.8176*1024 atoms/6.022*1023 atoms) = 8
8 mol B = 10.81 g/mol =
86.48 g of Boron
Is Pb(SO4) soluble?
NO
Pb(SO4) is an exception for the solubility of SO42-
Sodium Ion + Dichromate
2Na+ + Cr2O72- =
Na2Cr2O7