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Straighterline Chemistry Final With Complete Solution 100

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Straighterline Chemistry Final With Complete Solution 100

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  • June 23, 2024
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  • 2023/2024
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Straighterline Chemistry Final With Complete
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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 - Correct Answer - a. Law

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 - Correct Answer - b. Hypothesis

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 - Correct Answer - c. Homogeneous mixture

Which of the following does not have a uniform composition throughout?

Select one:

a. Element

b. Compound

c. Homogeneous mixture

d. Heterogeneous mixture

e. Solvent - Correct Answer - d. Heterogeneous mixture

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. - Correct Answer - a. Water, when heated, forms steam.

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 - Correct Answer - e. 6.53 × 1010 μg

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 - Correct Answer - a. 58 cm3

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

d. 0.155 in3

e. 0.0610 in3 - Correct Answer - e. 0.0610 in3

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 - Correct Answer - e. Atomic mass unit

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 - Correct Answer - b. 126

Which of these elements is chemically similar to magnesium?



Select one:

a. Sulfur

b. Calcium

c. Iron

d. Nickel

e. Potassium - Correct Answer - b. Calcium

C(graphite) and C(diamond) are examples of:



Select one:

a. isotopes of carbon.

b. allotropes of carbon.

c. the law of definite proportions.

d. different carbon ions. - Correct Answer - b. allotropes of carbon.

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.

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