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Molar Mass (I)
Molar Mass
(II)
Basic Questions about Moles
More Moles
Moles and Sig Figs
100
How many moles of sulfur are in 53.7 grams of sulfur?
What is 1.67 moles of sulfur
100
Calculate the molar mass of CaCOH.
What is 69.09 g/mol
100
What is Avogadro's Number?
What is 6 x 10^23
100
The number of molecules in a mole of a substance- a) is constant b) varies with temperature c) depends on the element/compound d) none of the above
a) is constant
100
Who was the scientist who created the law that under the same condition of temperature and pressure, equal volumes of all gases contain the same number of molecules? a) Ernest Rutherford b) Amadeo Avogadro c) Niels Bohr d) Alexander Oparin
Who is Amadeo Avogadro?
200
How many moles of lithium (Li) are in 1 mole of lithium hydride (LiH)?
What is 1 mole of lithium
200
Calculate the molar mass of RbOH·2H2O.
What is 138.47 g/mol
200
What is the volume of a mole of any gas at STP?
What is 22.4L
200
True/False: A mole of any element will weigh the same as a mole of another element.
False
200
True/False: 1 mole of a liquid at STP equals 22.4L.
False
300
How many moles of oxygen (O) are in 1 mole of calcium carbonate (CaCO3)?
What is 3 moles of oxygen
300
How many grams are in 8.2*10^22 moelcules of N2I6
What is 106.7 grams
300
We fill a balloon with 1.22 L of helium gas at STP. How many moles of helium are in the balloon?
What is 0.0545 mol
300
The mass in grams of one mole of a substance is called ________.
What is molar mass?
300
90010.0 has how many sig figs? a) 5 b) 4 c) 2 d) 6
What is 6
400
How many atoms of oxygen are in 2 moles of O2?
What is 2.41 x 1024 atoms of oxygen
400
How many grams of aluminum are in 0.58 moles of Al2O3·2H2O?
What is 31.3 grams of aluminum
400
We fill a balloon with 1.22 L of helium gas at STP. What is the mass of the gas inside the balloon?
What is 0.218 g
400
True/False: The molar mass of a compound can be calculated using the atomic masses of the atoms from the periodic table in their respective ratios.
True
400
True/False: The accuracy of the measuring instrument has an affect on the number of sig figs the measurement has.
True
500
How many moles of oxygen are in 2.71 x 1025 molecules of carbon dioxide (CO2)
What is 90 moles
500
What is the mass in milligrams of chlorine in 3.9 x 1019 molecules of Cl2
What is 4.6 mg of chlorine
500
We fill a balloon with 1.22 L of helium gas at STP. How many helium atoms are inside the balloon?
What is 3.28 x 1022 atoms
500
There is a _________ relationship between the mole and the volume of a gas at a given pressure and temperature.
What is direct relationship
500
The representative particle for an element is called an atom while the representative particle for a covalent compound is called a molecule. The representative particle of an ionic compound is called- a) units b) formula units c) molecules d) ionized molecules
What is formula units