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86 solutions

Mass Percent Formula

Q. 13. Ethamphetamine has the formula C10H15N. Calculate the percent composition of C, H, and N to four significant figures.

Solved • Feb 11, 2020

Mass Percent Formula

Q. 14. Ethanol has the formula CH3CH2OH. Calculate the percent composition of C, H, and O to four significant figures.

Solved • Feb 11, 2020

Mass Percent Formula

Q. A compound is isolated from the rind of lemons that is found to be 88.14% Carbon and 11.86% H by mass. How many grams of Carbon and hydrogen are there in a 200.0 g sample of this substance.

Solved • Feb 10, 2020

Mass Percent Formula

Q. Calculate the percent composition by mass of each element in KClO2.

Solved • Feb 10, 2020

Mass Percent Formula

Q. Pure gold is usually too soft for jewelry, so it is often alloyed with other metals. How many gold atoms are in a 0.362 ounce, 18 K gold bracelet? (18 K gold is 75% gold by mass.) Express your answer using two significant figures.

Solved • Feb 8, 2020

Mass Percent Formula

Q. Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm^3. A fitting composed of common brass has a total volume of 111.5 cm^3. How many atoms of zinc does the fitting contain?

Solved • Feb 8, 2020

Mass Percent Formula

Q. Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm^3. A fitting composed of common brass has a total volume of 111.5 cm^3. How many atoms of copper does the fitting contain?

Solved • Feb 8, 2020