Spring on D The Ch. 3 pop quiz Sp 2 x G texas southern univers x Send Email %20C

Question

Spring on D The Ch. 3 pop quiz Sp 2 x G texas southern univers x Send Email %20Ch.%203%20pop%20quiz Sp%202017%20Student.pdf Texas Southern University Chem 131-Quiz Chapter 3 & 4 Spring 2017 Date: Name LTIPLE CHoICE. Choose the one alternative that best completes the statement or answers the question. 1)A sample of pure lithium nitrate contains 799% lithium by mass. What is the lithium in a sample of pure lithium nitrate that has twice the mass of the first sample? D) 32.0% B) 4.00% C) 7.99% A) 16.0% 2) What is the empirical formula of a substance that contains 2.64 g of C, 0.444 gof H, and 7.04 g of o? E) CH202 D) C2H403 C) C3H404 A) C4H8O2. B) C2H402

Explanation / Answer

Ans 1. C) 7.99%

The lithium percent by mass in lithium nitrate will remain same because as the amount of lithium nitrate has doubled, the amount of lithium also doubled. So the percent by mass of lithium in the doubled sample remains same.

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