Straighterline Chemistry Final- deck 1 exam questions and 100% correct answers 2025

Straighterline Chemistry Final- deck
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 - ✔✔ 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

, Straighterline Chemistry Final- deck
1
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.



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



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 formula for sodium sulfide is

Select one: