Chemical Quantities (moles)
What is the molar mass of Ca3(PO4)2?g/mol Add atomic masses: 3 Ca (40.08) + 2 P (30.97) + 8 O (16.00) = 310.18.
310.18
Mole ratio of H2 to H2O in 2H2 + O2 → 2H2O?
1:1
Pressure of 2 mol gas in 10 L at 300 K?
4.92 atm
Which reaction absorbs energy?
Endothermic
Arrhenius acid does what?
Makes H+ ions in water
How many moles in 25g of NaCl?
0.427 mol
Grams of CO2 from 2 mol of C?
88 g
Volume of 1 mol gas at 2 atm, 273 K?
11.2 L
Heat released when 100 g water cools from 90°C to 30°C?
25,080 J
[H+] if pH is 3?
1 × 10^-3 M
How many molecules in 0.5 mol H2O?
3.01 × 10^23
Grams of H2O from 16g CH4?
36 g
Temperature with 1 mol gas in 22.4 L at 1 atm?
273 K
Why does water heat slowly?
High specific heat
HCl + NaOH makes...?
NaCl + H2O
How many molecules in 18g of H2O?
6.022 × 10^23
Liters of O2 for 22.4 L of CH4?
44.8 L
How many moles in 10 L tank at 3 atm, 300 K?
1.22 mol
What’s the 1st law of thermodynamics?
Energy is not created or destroyed
Why is HCl a strong acid?
It completely breaks apart in water
% Composition of H in H2O?
11.11%
Percent yield if you make 80 g but should get 100 g?
80%
Total pressure: 2 atm + 1 atm + 0.5 atm?
3.5 atm
What does a calorimeter measure?
Heat change
Name for H2SO4?
Sulfuric acid