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20 MCQs with Answer for Exam 1 - General Chemistry I | CHEM 1110, Exams of Chemistry

Roane State Community CollegeChemistry
Prof. James B. Condon

Material Type: Exam; Professor: Condon; Class: General Chemistry I; Subject: Chemistry; University: Roane State Community College; Term: Fall 2001;

Typology: Exams

Pre 2010

Uploaded on 08/18/2009

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Test 1 for CHEM 1110 - Fall 2001 page 1
TEST 1 for CHEM 1110 - Fall 2001 - Dr. Condon’s sections
A handy constant: NA = 6.022 × 1023 mol!1
A definition of the inch: 1 in / 2.54 cm
An equation: T/K = t°C/°C + 273.15
1. How many significant figures are there in the physical quantity 0.0431 m?
a. 1 b. 2 c. 3 d. 4 e. 5
2. What is the answer to the following numerical operation with respect to significant figures?
(2.43 + 9.1)/(1.32 × 10!4)
a. 9 × 104b. 8.7 × 104c. 8.73 × 104d. 8.735 × 104e. 8.7348 × 104
3. How many micrometers (:m) are there in 56 km?
a. 5.6 × 101 :m b. 5.6 × 10-4 :m c. 5.6 × 106 :m d. 5.6 × 107 :m e. 5.6 × 1010 :m
4. How many inches are there in 1.30 m?
a. 0.0330 in b. 3.30 in c. 0.512 in d. 330 in e. 51.2 in
5. Which of the following is the SI base unit symbol for temperature?
a. kg b. K c. Td. °C e. m
6. For the drawing to the right, what is the reading for the
portion of the buret shown?
a. 48.3 mL
b. 47.7 mL
c. 47.07 mL
d. 47.75 mL
e. 48.25mL
pf3
pf4

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Download 20 MCQs with Answer for Exam 1 - General Chemistry I | CHEM 1110 and more Exams Chemistry in PDF only on Docsity!

TEST 1 for CHEM 1110 - Fall 2001 - Dr. Condon’s sections A handy constant: NA = 6.022 × 10^23 mol!^1 A definition of the inch: 1 in / 2.54 cm An equation: T /K = t°C /°C + 273.

  1. How many significant figures are there in the physical quantity 0.0431 m? a. 1 b. 2 c. 3 d. 4 e. 5
  2. What is the answer to the following numerical operation with respect to significant figures? (2.43 + 9.1)/(1.32 × 10!^4 ) a. 9 × 10^4 b. 8.7 × 10^4 c.^ 8.73 × 10^4 d.^ 8.735 × 10^4 e.^ 8.7348 × 10^4
  3. How many micrometers (:m) are there in 56 km? a. 5.6 × 10^1 :m b. 5.6 × 10-4^ :m c. 5.6 × 10^6 :m d. 5.6 × 10^7 :m e. 5.6 × 10^10 :m
  4. How many inches are there in 1.30 m? a. 0.0330 in b. 3.30 in c. 0.512 in d. 330 in e. 51.2 in
  5. Which of the following is the SI base unit symbol for temperature? a. kg b. K c. T d. °C e. m
  6. For the drawing to the right, what is the reading for the portion of the buret shown? a. 48.3 mL b. 47.7 mL c. 47.07 mL d. 47.75 mL e. 48.25mL
  1. A a sample of a compound consists of 12.0 g of carbon, 6.00 g of hydrogen and 32.0 g of oxygen. What is the percent carbon in this compound? a. 64 % b. 37.5 % c. 31.6 % d. 12.0 % e. 24.0 %
  2. If a 6.89 mL sample of ethanol has a mass of 5.44 g, what is the density of ethanol? a. 0.789 g mL-1^ b. 1.27 g mL-1^ c. 37.5 g mL-1^ d. 0.0266 g mL-1^ e. 2.66 g L-
  3. One of the important characteristic of science is that: a. the law of science do not change. b. theories and observations are tentative. c.d. the best observations are the simplest observations.any observation must be expressed in terms physical quantities that have SI units. e. all theories must be back by writings that have some recognized universal authority.
  4. How many neutrons and protons does Chlorine-35, 3157 Cl, have? a. 18 protons and 17 neutrons b. 18 protons and 35 neutrons c. 17 protons and 18 neutrons d. 35 protons and 18 neutrons e. 17 protons and 17 neutrons
  5. Which of the following symbols is correct for the neutron? a. 10 n b. 11 p c. 11 n d. (^)!^01 e e. 01 n
  6. How many molecules of CH 3 OH are there in 7.50 moles of CH 3 OH? a. 8.46 × 10^24 b. 5.64 × 10^24 c. 2.34 d. 4.51 × 10^24 e. 14.

13.) 72 g of ammonia (NH 3 ) corresponds to how many moles of ammonia? ( 7 N,^1 H) a. 1.2 × 10^3 mol b. 0.236 mol c. 20 mol d. 0.194 mol e. 4.2 mol

KEY

1.c 2.c 3.e 4.e 5.b 6.d 7.e 8.a 9.b 10.c 11.a 12.d 13.e 14.b 15.b 16.a 17.e 18.e 19.e 20.d