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21 Cards in this Set
- Front
- Back
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Unit 5 |
ch 3 |
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Which of the following is a molecular element? |
I |
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Combustion analysis of 63.8 mg of a C, H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound? |
C3H6O |
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Determine the name for TiCO3. Remember that titanium forms several ions. |
titanium (II) carbonate
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What is the charge on the Cr ions in Cr2O3?
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3+ |
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Give the correct formula for aluminum sulfate.
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Al2(SO4)3 |
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Give the formula for sulfurous acid. |
H2SO3 |
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Give the name for PBr3.
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phosphorus tribromide |
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Calculate the molar mass of H2CO3. |
62.03 g/mol |
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Calculate the mass percent composition of sulfur in Al2(SO4)3.
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21.38 % |
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How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.
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3.68 × 1023 C atoms |
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How many molecules of butane are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.
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1.56 × 1023 molecules butane
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Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.
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PCl3 |
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Give a possible molecular formula for C3H5ClO
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C6H10Cl2O2
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What is the chemical formula for iron(III) sulfate?
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Fe2(SO4)3
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The chemical formula for the sulfite ion is
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S 2- |
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How many moles are there in 3.00 g of ethanol, CH3CH2OH?
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0.0652 mol |
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Which of the following has the greatest mass?
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3.88 × 1022 molecules of O2
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Which one of the following is not an empirical formula?
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C2H4O2 |
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Which of the following elements has the least tendency to form an ion?
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Kr |
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Which of the following is an ionic compound?
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Mg3(PO4)2 |
