Question 1

Which of the following is the smallest volume? A) 44 cm³ B) 1.0 dL C) 5.5 × 10³ mL D) 1.0 × 10⁸ nL

Accepted Answer

The answer of Which of the following is the smallest...

Question 2

A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore? A) 0.3 12 g mL^-1 B) 0. 633 g mL^-1 C) 1. 58 g mL^-1 D) 3.21 g mL^-1

Accepted Answer

The volume of the ore is found by subtracting the initial volume of water (21.25 mL) from the final volume (26.47 mL), which equals 5.22 mL. The density is then calculated by dividing the mass of the ore (8.25 g) by its volume (5.22 mL), resulting in approximately 1.58 g/mL.

Question 3

How many significant figures are in the measurement 210 g?
A) 2
B) 1
C) 3
D) 4
E) 5

Accepted Answer

210 g has 2 significant figures because the zeros are placeholders.

Question 4

Decanting is ________.
A) a process in which the more volatile liquid is boiled off
B) dissolving a solid into a liquid
C) separating a solid from a liquid by pouring off the liquid
D) pouring a mixture through a filter paper to separate the solid from the liquid
E) heating a mixture of two solids to fuse them together

Accepted Answer

Decanting involves separating a solid from a liquid by pouring off the liquid while leaving the solid behind. This can be useful in various laboratory and household settings, such as separating sediment from a liquid or pouring off water from cooked rice. None of the other options accurately describe decanting.

Question 5

Choose the homogeneous mixture from the list below.
A) chicken noodle soup
B) air
C) concrete
D) trail mix
E) blood

Accepted Answer

Air is a homogeneous mixture because it is composed of gases that are uniformly distributed throughout.

Question 6

Two or more substances in variable proportions, where the composition is constant throughout, are ________.
A) a compound
B) an element
C) a heterogeneous mixture
D) a homogeneous mixture
E) a crystalline solid

Accepted Answer

A homogeneous mixture is a combination of two or more substances in variable proportions that have a uniform composition throughout. Examples include solutions, alloys, and certain types of gases. The other options do not fit the description of a homogeneous mixture.

Question 7

Which of the following is the lowest temperature?
A) 42 °C
B) 57 °F
C) 318 K
D) All of these temperatures are equal.

Accepted Answer

57 °F is the lowest temperature because it is the smallest number among the options given.

Question 8

Choose the homogeneous mixture from the list below.
A) lemonade
B) mud
C) ice water
D) salad dressing
E) salsa

Accepted Answer

Lemonade is a homogeneous mixture because it has a uniform composition throughout, with the sugar, lemon juice, and water evenly distributed.

Question 9

What is the volume (in cm³) of a 43.6 g piece of metal with a density of 2.71 g cm^-3? A) 16.1 B) 19.5 C) 425 D) 6.65 E) none of the above

Accepted Answer

The answer of What is the volume (in cm³) of...

Question 10

The factor 1,000,000 corresponds to which prefix?
A) deka
B) deci
C) mega
D) milli

Accepted Answer

The prefix "mega" corresponds to a factor of 1,000,000.

Question 11

If the melting point of vanadium metal is 1910 °C, what is its melting point in kelvin?
A) 1029 K
B) 1637 K
C) 2183 K
D) 3470 K

Accepted Answer

To convert from Celsius to Kelvin, we add 273.15. Therefore, the melting point of vanadium in Kelvin is:

1910 + 273.15 = 2183.15 K

Rounded to the nearest whole number, the answer is:

2183 K

Question 12

Choose the compound from the list below.
A) magnesium
B) water
C) neon
D) helium
E) lithium

Accepted Answer

Water is the only compound listed. Magnesium, neon, helium, and lithium are all elements.

Question 13

Two or more substances in variable proportions, where the composition is variable throughout, are ________.
A) a solution
B) a homogeneous mixture
C) a compound
D) an amorphous solid
E) a heterogeneous mixture

Accepted Answer

Heterogeneous mixtures are those mixtures where two or more substances are not completely mixed and have uneven distribution. They show different properties in different parts of the mixture.

Question 14

What decimal power does the abbreviation n represent? A) 1 × 10¹⁵ B) 1 × 10² C) 1 × 10^-1 D) 1 × 10^-9 E) 1 × 10^-12

Accepted Answer

The abbreviation "n" stands for "nano," which represents the decimal power 1 × 10^-9.

Question 15

What symbol is used to represent the factor 10^-1? A) M B) m C) μ D) d

Accepted Answer

The answer of What symbol is used to represent the...

Question 16

What symbol is used to represent the factor 10¹? A) M B) da C) μ D) n

Accepted Answer

The answer of What symbol is used to represent the...

Question 17

The factor 10^-3 corresponds to which prefix? A) deka B) deci C) milli D) centi

Accepted Answer

The factor 10^1U1P1-3S1S1P0 represents a number that is equal to (10^1)×(10^1)×(10^-3)×(10^1)×(10^-3) which simplifies to 10. Therefore, this corresponds to the SI prefix "milli".

Question 18

A mass of mercury occupies 0. 750 L. What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g mL^-1 and the density of ethanol is 0.789 g mL^-1. A) 0.0 437 L B) 0. 0777 L C) 12.9 L D) 22.9 L

Accepted Answer

To find the volume of ethanol, first calculate the mass of mercury using its density and volume, then use the mass and density of ethanol to find its volume. The mass of mercury is 0.750 L * 13.546 g/mL = 10,159.5 g. The volume of ethanol is 10,159.5 g / 0.789 g/mL = 12,879.6 mL = 12.9 L.

Question 19

What decimal power does the abbreviation pico represent? A) 1 × 10¹⁰ B) 1 × 10³ C) 1 × 10^-4 D) 1 × 10^-12 E) 1 × 10^-10

Accepted Answer

The prefix "pico" represents a decimal power of 10^-12. Therefore, the correct answer is D) 1 × 10^-12.

Question 20

Choose the heterogeneous mixture from the list below.
A) sports drink
B) chlorine gas
C) black coffee
D) chicken noodle soup
E) carbon (graphite)

Accepted Answer

Chicken noodle soup contains multiple ingredients that can be easily distinguished from each other, such as noodles, vegetables, and chicken. Chlorine gas and carbon (graphite) are pure elements, and sports drinks and black coffee are homogeneous mixtures.

Quiz 1: Units of Measurement for Physical and Chemical Change

Which of the following is the smallest volume?

A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore?

How many significant figures are in the measurement 210 g?

Decanting is ________.

Choose the homogeneous mixture from the list below.

Two or more substances in variable proportions, where the composition is constant throughout, are ________.

Which of the following is the lowest temperature?

Choose the homogeneous mixture from the list below.

What is the volume (in cm3) of a 43.6 g piece of metal with a density of 2.71 g cm-3?

The factor 1,000,000 corresponds to which prefix?

If the melting point of vanadium metal is 1910 °C, what is its melting point in kelvin?

Choose the compound from the list below.

Two or more substances in variable proportions, where the composition is variable throughout, are ________.

What decimal power does the abbreviation n represent?

What symbol is used to represent the factor 10-1?

What symbol is used to represent the factor 101?

The factor 10-3 corresponds to which prefix?

A mass of mercury occupies 0. 750 L. What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g mL-1 and the density of ethanol is 0.789 g mL-1.

What decimal power does the abbreviation pico represent?

Choose the heterogeneous mixture from the list below.

What is the volume (in cm³) of a 43.6 g piece of metal with a density of 2.71 g cm^-3?

What symbol is used to represent the factor 10^-1?

What symbol is used to represent the factor 10¹?

The factor 10^-3 corresponds to which prefix?

A mass of mercury occupies 0. 750 L. What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g mL^-1 and the density of ethanol is 0.789 g mL^-1.