Exam (elaborations)

Straighterline Chemistry Final Exam Test Questions And Answers

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Course
NURSING 706

Institution
NURSING 706

Straighterline Chemistry Final Exam Test Questions And Answers. What is the term used for findings that are summarized based on a pattern or trend? a. Law b. Hypothesis c. Theory d. Phenomena e. Prediction Which of the following is a tentative explanation for a set of observations? Select ...

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Straighterline Chemistry Final Exam Test
Questions And Answers.

1). What is the term used for findings that are summarized based on a pattern or trend?
a. law
b. hypothesis
c. theory
d. phenomena
e. prediction

 Ans: a. Law

2). Which of the following is a tentative explanation for a set of observations?
select one:
a. law
b. hypothesis
c. theory
d. phenomena
e. prediction

 Ans: b. Hypothesis

3). If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
select one:
a. solute
b. compound
c. homogeneous mixture
d. heterogeneous mixture
e. solvent

 Ans: c. Homogeneous mixture

4). Which of the following does not have a uniform composition throughout?
select one:
a. element
b. compound
c. homogeneous mixture

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, d. heterogeneous mixture
e. solvent

 Ans: d. Heterogeneous mixture

5). Which one of these represents a physical change?
select one:
a. water, when heated, forms steam.
b. bleach turns hair yellow.
c. sugar, when heated, becomes brown.
d. milk turns sour.
e. apples, when exposed to air, turn brown.

 Ans: a. Water, when heated, forms steam.

6). How many micrograms are in 65.3 kg?
select one:
a. 0.653 μg
b. 6.53 × 107 μg
c. 6.53 × 104 μg
d. 6.53 × 10-8 μg
e. 6.53 × 1010 μg

 Ans: e. 6.53 × 1010 μg

7). A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0
millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in =
2.54 cm)
select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3
e. 34 cm3

 Ans: a. 58 cm3

8). Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
select one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3

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, d. 0.155 in3
e. 0.0610 in3

 Ans: e. 0.0610 in3

9). What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-12
atom?

select one:
a. isotope number
b. mass number
c. mass-to-charge ratio
d. atomic number
e. atomic mass unit

 Ans: e. Atomic mass unit

10). How many neutrons are there in an atom of lead whose mass number is 208?

select one:
a. 82
b. 126
c. 208
d. 290
e. none of them

 Ans: b. 126

11). Which of these elements is chemically similar to magnesium?

select one:
a. sulfur
b. calcium
c. iron
d. nickel
e. potassium

 Ans: b. Calcium

12). C(graphite) and c(diamond) are examples of:

select one:
a. isotopes of carbon.

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, b. allotropes of carbon.
c. the law of definite proportions.
d. different carbon ions.

 Ans: b. allotropes of carbon.

13). The 80br- ion has

select one:
a. 45 protons, 35 neutrons, 45 electrons.
b. 35 protons, 45 neutrons, 34 electrons.
c. 35 protons, 45 neutrons, 36 electrons.
d. 45 protons, 35 neutrons, 46 electrons.
e. 35 protons, 45 neutrons, 46 electrons.

 Ans: c. 35 protons, 45 neutrons, 36 electrons.

14). The formula for sodium sulfide is
select one:
a. nas
b. k2s
c. nas2
d. na2s
e. ses

 Ans: d. Na2S

15). Which one of the following formulas of ionic compounds is the least likely to be correct?
select one:
a. nh4cl
b. ba(oh)2
c. na2so4
d. ca2no3
e. cu(cn)2

 Ans: d. Ca2NO3

16). What is the name of clo - ion?
select one:
a. hypochlorite
b. chlorate
c. chlorite

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