Straighterline Chemistry Final
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
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
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
,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 ANS: 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. ANS: 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 ANS: 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 ANS: 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 ANS: 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 ANS: 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 ANS: b. 126
Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium ANS: 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. ANS: b. allotropes of carbon.
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
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
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
,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 ANS: 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. ANS: 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 ANS: 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 ANS: 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 ANS: 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 ANS: 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 ANS: b. 126
Which of these elements is chemically similar to magnesium?
Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium ANS: 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. ANS: b. allotropes of carbon.
