Q7. How many moles of oxygen atoms are there in 3.0 moles of Caz(P A. 2.0 C. 4.0 B. 8.0 Q8. Which combination of formula/name is incorrect A. FeO/iron (II)oxida D. 1.0 B. CrO3/chromium (VI) oxide D. Fe2S3/iron (II) sulfide
Q7. How many moles of oxygen atoms are there in 3.0 moles of Caz(P A. 2.0 C. 4.0 B. 8.0 Q8. Which combination of formula/name is incorrect A. FeO/iron (II)oxida D. 1.0 B. CrO3/chromium (VI) oxide D. Fe2S3/iron (II) sulfide
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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pleasssssse solve question 7
![Q1. The correct conversion expression between degrees °C to K is?
A. T(K)=t(°C) + 273.15
C. T(K)= [t(°C) -32]/1.8
B. T(K) 273-1(°C)
D. T(K)-1(°C)
Q2. The density of a metal is 13.6 g/cm³. The density of the metal is ------- kg/m³
A.1.36 × 10²
B. 1.36 x 104
C. 1.36 × 108
D. 1.36 x 10-5
Q3. Precision refers to how a measured number is close to
A. Other measured numbers
C. The calculated value
B. The true value
D. zero
Q4. Which of the following has the same number of significant figures as the number 1.0310?
B. 199.79
A. 100.0
C. 8.66
D. 5.119
Q5 A combination of sand, salt, and water is an example of a
A. Homogeneous mixture
C. Compound
A. 20p, 20n, and 18 e
C. 20 p, 22 n, and 18 e
B. Heterogeneous mixture
D. Pure substance
Q6. How many protons, neutrons, and electrons respectively are in
40
20
Ca²
B. 22 p, 20 n, and 20 e
D. 22 p, 18 n, and 18 e.
-Q8. Which combination of formula/name is incorrect
A. FeO/iron (II) oxide
CN₂O/ dinitrogen monoxide
D. 1.0
Q7. How many moles of oxygen atoms are there in 3.0 moles of Ca3(PO4)2?
A. 2.0
C. 4.0
B. 8.0
B. CrO3/chromium (VI) oxide
D. Fe2S3/iron (II) sulfide
Q9. How many oxygen atoms are present in a 5.00 mole sample of Al2(SO4)3?
A.9.03 x 1024
B.3.61 x 1025
C.3.01 x 1024
D. 1.20
mol) when 0.100](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3428d769-ec79-41b5-b82c-ff9e74b8d939%2F9d0e7f41-d701-4c10-a892-61ddbe28d8e5%2Fhy1wsm_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q1. The correct conversion expression between degrees °C to K is?
A. T(K)=t(°C) + 273.15
C. T(K)= [t(°C) -32]/1.8
B. T(K) 273-1(°C)
D. T(K)-1(°C)
Q2. The density of a metal is 13.6 g/cm³. The density of the metal is ------- kg/m³
A.1.36 × 10²
B. 1.36 x 104
C. 1.36 × 108
D. 1.36 x 10-5
Q3. Precision refers to how a measured number is close to
A. Other measured numbers
C. The calculated value
B. The true value
D. zero
Q4. Which of the following has the same number of significant figures as the number 1.0310?
B. 199.79
A. 100.0
C. 8.66
D. 5.119
Q5 A combination of sand, salt, and water is an example of a
A. Homogeneous mixture
C. Compound
A. 20p, 20n, and 18 e
C. 20 p, 22 n, and 18 e
B. Heterogeneous mixture
D. Pure substance
Q6. How many protons, neutrons, and electrons respectively are in
40
20
Ca²
B. 22 p, 20 n, and 20 e
D. 22 p, 18 n, and 18 e.
-Q8. Which combination of formula/name is incorrect
A. FeO/iron (II) oxide
CN₂O/ dinitrogen monoxide
D. 1.0
Q7. How many moles of oxygen atoms are there in 3.0 moles of Ca3(PO4)2?
A. 2.0
C. 4.0
B. 8.0
B. CrO3/chromium (VI) oxide
D. Fe2S3/iron (II) sulfide
Q9. How many oxygen atoms are present in a 5.00 mole sample of Al2(SO4)3?
A.9.03 x 1024
B.3.61 x 1025
C.3.01 x 1024
D. 1.20
mol) when 0.100
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