Chem
Which elements are diatomic?
H, N, F, O, I, Cl, Br
Name for H3O+
Hydronium ion
How many sig figs for (.28)2?
Powers are just multiplying, so regular sig fig rules apply
Liquid to Solid
Freezing
What is Avogadro's number?
6.02*10^23, 1 mole
What is the name of group 7A on the periodic table?
The Halogens
Formula for Ferric
Fe3+
Expand ln(12z3)
ln(12)+3ln(z)
Solid to Liquid
Fusion (Melting)
Can chemical equations be balanced using grams as the only unit?
No, grams must be converted to moles to compare in a chemical equation.
Name AsF3
Arsenic trifluoride
Formula for biphosphate
HPO42-
How does one write a square root as an exponent?
n1/2
Gas to Liquid
Condensation
How do you balance a combustion reaction?
Balance C, Balance H, Balance O (Multiply by a constant if you have a fraction)
What is the name of group 1A on the periodic table?
Alkali Metals
Formula for Calcium Carbonate
CaCO3
How many sig figs for:
((561738.847-3.4552)/821)*1022
1
Gas to Solid
Deposition
How do you find the empirical formula of a compound given the amount of moles of each element?
If any result differs from a whole number by less than 0.1, round to the nearest whole number.
or
If any result differs by more than 0.1, multiply all results by the whole number required to bring that result within 0.1 of a whole number.
What is the electronegativity trend on the periodic table?
Upwards and to the right
Formula for Aluminum Oxide
Al2O3
s=sqrt((sum(x-av)^2)/(n-1))
Solid to Gas
Sublimation
Which has a bigger charge: Something ending in -ous or -ic?