Part A: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. How many electrons, protons, and neutrons are in A) 54 electrons, 50 protons, and 70 neutrons B) 50 electrons, 54 protons, and 70 neutrons C) 46 electrons, 50 protons, and 70 neutrons D) 50 electrons, 50 protons, and 120 neutrons 2. Which element will form a covalent bond with nitrogen? A) Be B) Li C) K D) O 3. How many ions are represented in the formula (NH4)2HPO4? A) 0 B) 2 C) 3 D) 4 [¹30 Sn]? 4. Aqueous solutions of two fictitious ionic compounds, X₂Y and ZW2, react in a double displacement reaction. What are the products? A) XW and ZY B) X₂W and ZY C) XW and ZY₂2 D) X₂Z and YW₂ 5. What is the molar mass of Ca3(PO4)2? A) 87.05 g/mol B) 215.20 g/mol C) 309.97 g/mol D) 430.39 g/mol 6. The average of the total mass of all an element's isotopes is called: A) the isotopic abundance B) the weighted average C) the average molar mass D) the average atomic mass 7. What is the percent composition of phosphorus in ammonium phosphate? A) 63.2% B) 36.4% C) 28.2% D) 20.8%
Part A: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. How many electrons, protons, and neutrons are in A) 54 electrons, 50 protons, and 70 neutrons B) 50 electrons, 54 protons, and 70 neutrons C) 46 electrons, 50 protons, and 70 neutrons D) 50 electrons, 50 protons, and 120 neutrons 2. Which element will form a covalent bond with nitrogen? A) Be B) Li C) K D) O 3. How many ions are represented in the formula (NH4)2HPO4? A) 0 B) 2 C) 3 D) 4 [¹30 Sn]? 4. Aqueous solutions of two fictitious ionic compounds, X₂Y and ZW2, react in a double displacement reaction. What are the products? A) XW and ZY B) X₂W and ZY C) XW and ZY₂2 D) X₂Z and YW₂ 5. What is the molar mass of Ca3(PO4)2? A) 87.05 g/mol B) 215.20 g/mol C) 309.97 g/mol D) 430.39 g/mol 6. The average of the total mass of all an element's isotopes is called: A) the isotopic abundance B) the weighted average C) the average molar mass D) the average atomic mass 7. What is the percent composition of phosphorus in ammonium phosphate? A) 63.2% B) 36.4% C) 28.2% D) 20.8%
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
chemistry grade 12 collage
Multiple Choice
Transcribed Image Text:Part A: Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
1. How many electrons, protons, and neutrons are in
A) 54 electrons, 50 protons, and 70 neutrons
B) 50 electrons, 54 protons, and 70 neutrons
C) 46 electrons, 50 protons, and 70 neutrons
D) 50 electrons, 50 protons, and 120 neutrons
2. Which element will form a covalent bond with nitrogen?
A) Be
B) Li
C) K
D) O
B) 2
C) 3
D) 4
3. How many ions are represented in the formula (NH4)2HPO4?
A) 0
A) XW and ZY
B) X₂W and ZY
C) XW and ZY2
D) X₂Z and YW₂
4. Aqueous solutions of two fictitious ionic compounds, X₂Y and ZW2, react in a double displacement
reaction. What are the products?
5. What is the molar mass of Ca3(PO4)2?
A) 87.05 g/mol
B) 215.20 g/mol
120 Sn
C) 309.97 g/mol
D) 430.39 g/mol
2
C) the average molar mass
D) the average atomic mass
6. The average of the total mass of all an element's isotopes is called:
A) the isotopic abundance
B) the weighted average
C) 28.2%
D) 20.8%
7. What is the percent composition of phosphorus in ammonium phosphate?
A) 63.2%
B) 36.4%
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