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
![First Year Secondary
First Term 2019/ 2020
CHEMISTRY
MODEL QUESTIONS
Choose the correct answer for each question,
1. How many atoms are there in one mole of CH OH?
A.6 atoms
B. 6.0 x 10 atons
C. 12.0 x 10 atoms
D.3.6 x 10 atoms
NH: + 02 NO, - H;0
Balance the equation given above. Then, find the number of
moles of oxygen gas O, involved in the reaction.
A. I mole
B. 3 moles
C. 4 moles
D.7 moles
3. When iron pyrite (FeS2) is heated in air, the process is known as
"roasting". It forms sulfur dioxide and iron (III) oxide as follows:
FeS, - 0, = SO,+ Fe;O3
Balance the given equation, and then, choose the corrct choice
of the number of moles for the reactants and products.
A. 4, 2, 8, 7 respestivei uo /
B. 2, 4, 7, 8 réspectively
C. 2, 11,7, 8 respectively
D.4, 11, 8, 2 respectively
4. Doctars recommend taking vitamin (C) in winter days, How many
moles of Vitamin C. (C.H,O), are there in 528 g of Vitamin C?
given that:
A.2 moles
(C =12, H=1. o= 16)
B.2,75 moles
4 moles
D.5 moles](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff84d66d0-61c3-4d66-bd2f-0aa0c54ed388%2F98eba132-097e-430e-9c87-504c7990f88e%2Fp6n6mkb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:First Year Secondary
First Term 2019/ 2020
CHEMISTRY
MODEL QUESTIONS
Choose the correct answer for each question,
1. How many atoms are there in one mole of CH OH?
A.6 atoms
B. 6.0 x 10 atons
C. 12.0 x 10 atoms
D.3.6 x 10 atoms
NH: + 02 NO, - H;0
Balance the equation given above. Then, find the number of
moles of oxygen gas O, involved in the reaction.
A. I mole
B. 3 moles
C. 4 moles
D.7 moles
3. When iron pyrite (FeS2) is heated in air, the process is known as
"roasting". It forms sulfur dioxide and iron (III) oxide as follows:
FeS, - 0, = SO,+ Fe;O3
Balance the given equation, and then, choose the corrct choice
of the number of moles for the reactants and products.
A. 4, 2, 8, 7 respestivei uo /
B. 2, 4, 7, 8 réspectively
C. 2, 11,7, 8 respectively
D.4, 11, 8, 2 respectively
4. Doctars recommend taking vitamin (C) in winter days, How many
moles of Vitamin C. (C.H,O), are there in 528 g of Vitamin C?
given that:
A.2 moles
(C =12, H=1. o= 16)
B.2,75 moles
4 moles
D.5 moles
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