Q2. The density of a metal is 13.6 x 10 Kg/m³. The density of the metal is- A.13.6 B. 1.36 C. 136 Q3. Accuracy refers to how close a measured number is A. zero B. T(K)-273-t(°C) D. T(C)-1(K)-275.15 ******* g/cm D. 0.136 x 10
Q2. The density of a metal is 13.6 x 10 Kg/m³. The density of the metal is- A.13.6 B. 1.36 C. 136 Q3. Accuracy refers to how close a measured number is A. zero B. T(K)-273-t(°C) D. T(C)-1(K)-275.15 ******* g/cm D. 0.136 x 10
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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Q 2 please
![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
Q2. The density of a metal is 13.6 x 10 Kg/m³. The density of the metal is ------ g/cm
A.13.6
B. 1.36
C. 136
D. 0.136 x 105
B. T(K)=273-t(°C)
D. T(C)-(K)-275.15
Q3. Accuracy refers to how close a measured number is to
A. zero
C. Other measured numbers
B. The calculated value
D. The true value
Q4. Which of the following has the same number of significant figures as the number 0.00310?
A. 1 x 106
B. 199.791
C. 8.66
D. 5.119
Q5 A combination of sugar, salt, and water is an example of a
A. Homogeneous mixture
C. compound
Q8. Which combination of formula/name is correct.
A. C0203/cobalt (III) oxide
C N₂O/ nitrogen monoxide
B. Heterogeneous mixture
D. pure substance
Q6. How many protons, neutrons, and electrons respectively are
A. 197, 79, 118
C. 79, 118, 118
197
Au
B. 118, 79, 39
D. 79, 118, 117
Q7. How many moles of sulfur atoms are there in 3.0 moles of Al2(SO4)3?
A. 12.0
B. 3.0
C. 4.0
D. 1.0
B. CrO;/chromium (III) oxide
D. Fe₂S3/iron (II) sulfide
Q9. How many oxygen atoms are present in a 5.00 mole sample of Al2(CO3)3?
B. 2.71 x 1024
A. 9.03 x 1024
C. 2.71 x 1025
D. 1.20 x 1025
Q10. Calculate the theoretical yield of ZnCl₂ (M. mas = 136.28 g mol) when 2.50 g HCI (M.
mol) reacts with 3.50 g Zn (molar mas= 65.38 g mol-¹)
A. 4.67 g
B. 7.30 g
Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
C, 9.34g
D, 14.6 g
mas-36.468](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F48ed58b1-dcb7-4b16-9209-abaf1a4086d3%2Fe8266b68-ee72-4809-a2e9-9ec7042d729d%2F5s105q3_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
Q2. The density of a metal is 13.6 x 10 Kg/m³. The density of the metal is ------ g/cm
A.13.6
B. 1.36
C. 136
D. 0.136 x 105
B. T(K)=273-t(°C)
D. T(C)-(K)-275.15
Q3. Accuracy refers to how close a measured number is to
A. zero
C. Other measured numbers
B. The calculated value
D. The true value
Q4. Which of the following has the same number of significant figures as the number 0.00310?
A. 1 x 106
B. 199.791
C. 8.66
D. 5.119
Q5 A combination of sugar, salt, and water is an example of a
A. Homogeneous mixture
C. compound
Q8. Which combination of formula/name is correct.
A. C0203/cobalt (III) oxide
C N₂O/ nitrogen monoxide
B. Heterogeneous mixture
D. pure substance
Q6. How many protons, neutrons, and electrons respectively are
A. 197, 79, 118
C. 79, 118, 118
197
Au
B. 118, 79, 39
D. 79, 118, 117
Q7. How many moles of sulfur atoms are there in 3.0 moles of Al2(SO4)3?
A. 12.0
B. 3.0
C. 4.0
D. 1.0
B. CrO;/chromium (III) oxide
D. Fe₂S3/iron (II) sulfide
Q9. How many oxygen atoms are present in a 5.00 mole sample of Al2(CO3)3?
B. 2.71 x 1024
A. 9.03 x 1024
C. 2.71 x 1025
D. 1.20 x 1025
Q10. Calculate the theoretical yield of ZnCl₂ (M. mas = 136.28 g mol) when 2.50 g HCI (M.
mol) reacts with 3.50 g Zn (molar mas= 65.38 g mol-¹)
A. 4.67 g
B. 7.30 g
Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
C, 9.34g
D, 14.6 g
mas-36.468
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