Week 4 electron structure
Authored by Beth Lowe
Chemistry
University
NGSS covered
Used 1+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many hydrogen atoms are in 2.00 mol of CH4?
4.82E24 H atoms
1.20E24 H atoms
6.02E23 H atoms
2.41E24 H atoms
2.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Magnesium has three isotopes: Mg-24 (78.99% abundance, 23.985042 amu), Mg-25 (10.00% abundance,24.985837 amu), and Mg-26 (11.01% abundance, 25.982593 amu). Calculate the average atomic mass in amus. Enter only the number without units
(a)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many hydrogen atoms are in 5.00 g of H2O?
1.67E23 H atoms
6.02E23 H atoms
1.20E24 H atoms
2.41E24 H atoms
4.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula. Enter the formula without using superscripts. Ex H2O
(a)
5.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen? Enter the formula with out subscripts. Ex H2O
(a)
6.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Name Al(NO3)3
(a)
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Name FeCl3
(a)
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