Use the References to access important values if needed for th 1. What is the mass of 1.53x1024 atoms of helium? grams 2. How many helium atoms are there in 46.4 grams of helium? atoms Submit Answer 5 question attempts remaining
Use the References to access important values if needed for th 1. What is the mass of 1.53x1024 atoms of helium? grams 2. How many helium atoms are there in 46.4 grams of helium? atoms Submit Answer 5 question attempts remaining
Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN:9781305960060
Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Chapter2: Atoms And Molecules
Section: Chapter Questions
Problem 2.24E: Round atomic weights to the nearest whole number, and determine how many helium atoms would balance...
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Step 1
We know that:
1 mole of a substance consist of 6.022*1023 atoms.
(A) We need to calculate the mass of 1.53*1024 atoms of Helium:
We know that: 1 mole of He atom weighs 4.0026 g.
ie 4.0026 g of He consist of 6.022*1023 atoms.
Thus, 1.53*1024 atoms of He will weigh (4.0026 g/6.022*1023 atoms)*(1.53*1024 atoms)
= 10.17 grams
Thus, 1.53*1024 atoms of He will weigh 10.17 grams.
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