How many Mg2+ ions are in 1.00 mol of MgO?
6.02 x1023
How many grams of NaCl are present in 11.00 moles?
642.9 g
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How many Mg2+ ions are found in 3.00 moles of MgCl2
1.81 x1024
How many grams of silicon would there be in a sample that contained 9.99 x 1052 atoms?
4.66 x 1030
Given three (3.00) moles of gold (Au), how many grams do you have?
591 g
The sum of the atomic masses of all the atoms in a formula for a covalent compound is the
molecular mass
How many molecules in 0.20 mol of H2O
1.2 x1023 molecules
How many moles are there in a sample containing 2.408 x 1024 atoms of carbon?
4.000
What is the formula mass of MgSO4?
120.37 amu
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What is the mass of a mole of an element?
The amu of the element found on the periodic table
What is the percent of hydrogen in methane, CH4?
25.1
What is the formula mass of sodium chloride, NaCl?
58.44 amu
C = 40.9%
H = 4.58%
O = 54.5%
What is the empirical formula for the molecule?
C3H4O3
An unknown compound has the empirical formula CH. If the molar mass of the compound is determined to be 26.0 g/mol, what is its molecular formula?
C2H2