Mole Conversions and % Composition
What is the molar mass of C3H2?
38.05 g/mol
What is mole ratio?
The ratio of coefficients in a balanced equation
What is it called when the reactant is used up first, runs out?
Limiting Reactant
What is the temperature scale used in gas law calculations?
Kelvin (K)
What is molarity?
Moles of solute per liter of solution (mol/L)
What is Avogadro's number?
6.022 x 1023 particles
How many moles of water are produced from 2.0 mol of H2?
_H2 + _O2 -> _H2O
2.0 moles
What do you call the reactant that is still remaining after the reaction?
Excess Reactant
Boyle's Law
Concentration
What is the molar mass of H2SO4?
98.08 g/mol
How many moles of water are produced from 4 moles of O2?
_H2 + _O2 -> _H2O
8 moles of water
What do you call the maximum amount of product predicted by calculations?
Which law has pressure staying the same?
Charles's Law
What is the equation for solving for pH?
pH = -log [H+]
How many molecules are in 50.0g of H2O?
1.67 x 1024 molecules
How many grams of water are produced from 10g of O2?
_H2 + _O2 -> _H2O
11.25 g of water
What do you call the amount of product that is actually obtained in lab?
Actual Yield
What is the formula for ideal gas law?
PV = nRT
What is the equation to solve for [OH-]?
[OH-] = 10-pOH
Find the percent by mass of sulfur in H2S
94.08% S
How many grams of H2 are produced from 301g of O2?
_H2 + _O2 -> _H2O
37.9 grams
What is the formula for percent yield?
(Actual / Theoretical) x 100%
Determine the partial pressures of each gas present in the container. If volume is 50 L and we are at 88.2 degrees celsius?
N2: 2 mol
O2: 4 mol
N2: 1.186 atm
O2: 2.371 atm
What is the molarity of HCl, if at 15 mL, it takes 20mL of 0.500 M NaOH to neutralize it?
_HCl + _NaOH -> _H2O + _NaCl
0.667 M HCl