A direct measurement on a sample of pure substance can be converted to a count of the number of particles through.....
What is Stoichiometry
100
What is a molar volume
What is volume ocupide by one mole of a substance at a given tempature and pressure
100
What is the percent boron by mass in boric acid H3BO3?
What is 17.5%
100
How many moles of sucrose, C12H22O11, are in 1222 g of sucrose?
What is 1.22moles
100
Calculate the mass in grams of 0.0790 moles of aluminum.
What is 2.1g
200
How many atoms are in 34.6g of carbon?
What is 1.74 x 10^24 atoms
200
What is the mass of 0.100mole of sodium chloride
What is 5.85g
200
According to the equation 2HBr + Na2CO3 → NaBr + H2O + CO2, what volume of CO2 at 1.230 atm and 325 K is produced by 50.0 g of HBr reacting with an excess of Na2CO3?
What is 6.70L
200
Using the given formula, how many moles are present in a 3.5 L sample of gas at 25ºC and 275 kPa?
PV=nRT
What is .39mol
200
How many moles of chlorine are in 100 g chlorine (Cl)?
What is 2.82moles
300
What is the molar mass of carbon dioxide
What is 44.0g /mol
300
what volume of HCL at STP can be produced by the reaction of 12.0L of Hydrogen and 24.0L of Chlorine both at STP?
What is 24.0L
300
How many moles of magnesium atoms is 7.32 × 1026 atoms?
What is 1.22 X 10^3mol
300
What is the molar mass of arsenic?
What is 74.9g/mol
300
80.0 g of butane burns according to the chemical equation 2C4H10 + 13O2 → 8CO2 + 10H2O. What mass of oxygen reacts?
What is 286g
400
How many atoms of carbon are in a pure sample of carbon having a mass of 72.0g?
What is 3.6 x 10^24 atoms
400
2.5g of diatomic oxygen occupies 3.00L at 266K what is the preasure of oxygen
What is 42.0kPa
400
Calculate the number of moles of hydrogen atoms in 4.75 mol sulfuric acid.
What is 9.5mol
400
How many moles of calcium are in 0.544 g of calcium?
What is .0136moles
400
At STP, one molar volume is __________.
What is 22.4l
500
Describe the relationsip between mass and moles
What is the measure of the amount of a substance
500
The number of things in one mole is the..
What is Avogardo constant
500
Determine the number of atoms in 3.54 mol S.
What is 1.7 x 10^23atoms
500
What is the mass of 2.40 mol of copper?
What is 152g
500
If the theoretical yield of a reaction is 0.2100 g and the actual yield is 0.1880 g, what is the percent yield?