Chemistry Homework Help

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Mass Percent

Q. Calculate the percent mass of sulfuric acid in a 6.0 M HeSO4 solution. The density of the solution is 1.34 g/mL.

Solved • Nov 23, 2019

Mass Percent

Q. Calculate the mass percent composition of nitrogen in N2O

Solved • Nov 21, 2019

Mass Percent

Q. A 1.912g sample of calcium chloride is decomposed into it's constituent elements and found to contain 0.690g Ca and 1.222g Cl. Calculate the mass percent composition of Ca and Cl in calcium chloride.

Solved • Nov 21, 2019

Mass Percent

Q. A mixture of CaCo3 and (NH4)2CO3 is 61.9% CO3 by mass. Find the mass percent of CaCO3 in the mixture. (Where does the 96g of (NH4)2CO3 come from)

Solved • Nov 10, 2019

Mass Percent

Q. Calculate the mass/volume percent of a NaCl solution in which 160 g of NaCl is dissolved in enough water to give a total volume of 2.44 L. Express your answer numerically.

Solved • Nov 7, 2019

Mass Percent

Q. A 4.853 g sample containing Zn2+ is dissolved and treated with excess (NH4)2HPO4 , resulting in the formation of the precipitate ZnNH4PO4⋅H2O . The precipitate is filtered, washed, dried, and then ignited to convert the precipitate to Zn2P2O7 . The mass of Zn2P2O7 collected was 0.948 g. Calculate the weight percent of Zn2+ in the original sample.

Solved • Oct 22, 2019

Mass Percent

Q. After 2.325g of BaCl2 hydrate is dried, its new mass is measured to be 1.982g. Compute the mass percent of the hydrate. Determine the hydrate number for BaCl2

Solved • Oct 16, 2019