Question 1

The symbol for the element calcium is __________.

Accepted Answer

The symbol for calcium is Ca, as indicated on the periodic table.

Question 2

The symbol for the element magnesium is __________.

Accepted Answer

The symbol for an element is a one or two letter code used to represent the element. Magnesium's symbol is Mg.

Question 3

The output of a plant is 4335 pounds of ball bearings per week (five days). If each ball bearing weighs 0.0113 g, how many ball bearings does the plant make in a single day? (Indicate the number in proper scientific notation with the appropriate number of significant figures.)

Accepted Answer

To find the number of ball bearings produced in one day, we need to divide the total production of 4335 pounds by the number of days in a week (5):

4335 pounds/week ÷ 5 days/week = 867 pounds/day

Next, we need to convert pounds to grams, since the weight of the ball bearings is given in grams. There are 453.59 grams in a pound, so:

867 pounds/day × 453.59 grams/pound = 393,228.53 grams/day

Finally, we can divide the total weight of ball bearings produced in a day by the weight of each ball bearing to find the number of ball bearings:

393,228.53 grams/day ÷ 0.0113 g/ball bearing = 34,784,070.8 ball bearings/day

Since we want to express this number in scientific notation with the appropriate number of significant figures (three), we need to round it to 3.48 × 10^7 ball bearings/day, which is closest to choice D.

Question 4

A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 ml. The mass of the water, flask, and metal is 268.5 g. If the mass of the flask is 139.3 g and the density of water is 1.000 g/ml, the density of the solid is __________ g/cm³.

Accepted Answer

To find the density of the solid, first calculate the mass of the water: 268.5 g (total mass) - 139.3 g (flask) - 4.369 g (metal) = 124.831 g of water. Since the density of water is 1 g/ml, the volume of water is 124.831 ml. The volume of the metal is the total volume minus the volume of water: 126.4 ml - 124.831 ml = 1.569 ml. Density of the metal = mass/volume = 4.369 g / 1.569 ml = 2.783 g/cm³, which rounds to 2.73 g/cm³.

Question 5

There are __________ ng in a pg.

Accepted Answer

"ng" stands for nanogram, which is one billionth of a gram. Therefore, there are 0.001 nanograms in a picogram (pg).

Question 6

A rectangular water tank is 14.5 cm long and 4.63 cm wide. If 368.5 g of water completely fills the tank, the height of the tank is __________ cm. (Assume the density of water is 1.000 g/ml.)

Accepted Answer

First, we need to find the volume of the tank:

Volume = length x width x height
Volume = 14.5 cm x 4.63 cm x height
Volume = 67.0355 cm^3

Since the density of water is 1.000 g/mL and the tank is filled with 368.5 g of water:

Density = mass/volume
1.000 g/mL = 368.5 g / 67.0355 cm^3

Solving for volume:

Volume = 368.5 g / 1.000 g/mL
Volume = 368.5 mL

Now we can find the height of the tank:

Volume = length x width x height
368.5 mL = 14.5 cm x 4.63 cm x height
Height = 368.5 mL / (14.5 cm x 4.63 cm)
Height = 5.49 cm

Therefore, the height of the tank is 5.49 cm. The correct choice is B.

Question 7

There should be __________ significant figures in the answer to the following computation.

Accepted Answer

The answer of There should be __________ significant figures in...

Question 8

1.55 kg/m³ is equivalent to __________ g/L.

Accepted Answer

1 kg/m³ is equivalent to 1 g/L. Therefore, 1.55 kg/m³ is equivalent to 1.55 g/L.

Question 9

An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 4.69 g. If the volume of this sphere is less than __________ cm³, then the sphere will sink in liquid mercury (density = 13.6 g/cm³).

Accepted Answer

The density of the sphere is 4.69 g / (volume of the sphere) cm³. If the volume of the sphere is less than 0.345 cm³, then the density of the sphere will be greater than 13.6 g/cm³, and the sphere will sink in liquid mercury.

Question 10

What decimal power does the abbreviation f represent?

Accepted Answer

The abbreviation "f" stands for "femto," which represents the decimal power of 1 × 10^-15.

Question 11

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m³ is __________.

Accepted Answer

The volume of a cube is found by cubing the length of one of its edges. So, the volume in cubic centimeters is $13^3 = 2197 \, \text{cm}^3$. To convert cubic centimeters to cubic meters, we use the conversion $1 \, \text{m}^3 = 10^6 \, \text{cm}^3$, so $2197 \, \text{cm}^3 = 2.197 \times 10^3 \, \text{cm}^3 = 2.2 \times 10^{-3} \, \text{m}^3$, since $2.197$ rounds to $2.2$ when expressed with two significant figures.

Question 12

__________ significant figures should be retained in the result of the following calculation.

Accepted Answer

The answer of __________ significant figures should be retained in...

Question 13

The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take __________ days to travel between the Earth and Moon.

Accepted Answer

The answer of The distance from the Earth to the...

Question 14

The density of a 167.4 g sample of magnesium having a volume of 96.32 ml is __________ g/cm³.

Accepted Answer

The answer of The density of a 167.4 g sample...

Question 15

An iron mine produces 1.67 x 10⁴ tons of raw ore per day. If the ore is 26.39% elemental iron, the mine produces __________ pounds of elemental iron per year. (Assume the mine operates 365 days per year.)

Accepted Answer

First, calculate the annual production of raw ore: 1.67 x 10^4 tons/day * 365 days/year = 6.0955 x 10^6 tons/year. Then, calculate the annual production of elemental iron: 6.0955 x 10^6 tons/year * 0.2639 = 1.608 x 10^6 tons/year. Convert tons to pounds (1 ton = 2000 pounds): 1.608 x 10^6 tons/year * 2000 pounds/ton = 3.216 x 10^9 pounds/year, which is approximately 3.217 x 10^9 pounds/year.

Question 16

The quantity 1.0 mg/cm² is the same as 1.0 × __________ kg/m².

Accepted Answer

The answer of The quantity 1.0 mg/cm² is the same...

Question 17

The symbol for the element mercury is __________.

Accepted Answer

The symbol for the element mercury is Hg.

Question 18

The temperature of -25 °C is __________ in Kelvins.

Accepted Answer

The answer of The temperature of -25 °C is __________...

Question 19

The density of mercury is 13.6 g/cm³. The density of mercury is __________ kg/m³.

Accepted Answer

To convert the density of mercury from g/cm³ to kg/m³, we need to multiply by 1000 (to convert grams to kilograms) and 100³ (to convert cubic centimeters to cubic meters).
So, Density of mercury in kg/m³ = 13.6 x 1000 x 100³
= 1.36 x 10⁵ kg/m³
Therefore, the best choice is option B, which is 1.36 × 10⁴ kg/m³.

Question 20

The density of lead is 11.4 g/cm³. The mass of a lead ball with a radius of 0.50 mm is __________ g.

Accepted Answer

The volume of the lead ball can be calculated using the formula for the volume of a sphere:

V = (4/3)πr^3

Plugging in the given radius of 0.50 mm (which is 0.050 cm in units that match the density given), we get:

V = (4/3)π(0.050 cm)^3

V = 5.24 x 10^-5 cm^3

To find the mass, we can use the density formula:

density = mass/volume

rearranging this to solve for mass, we get:

mass = density x volume

Plugging in the given density, we get:

mass = (11.4 g/cm^3)(5.24 x 10^-5 cm^3)

mass = 6.0 x 10^-4 g

So, the answer is D: 6.0 x 10^-3 g (expressed in scientific notation).

Quiz 1: Introduction: Matter and Measurement

The symbol for the element calcium is __________.

The symbol for the element magnesium is __________.

The output of a plant is 4335 pounds of ball bearings per week (five days) . If each ball bearing weighs 0.0113 g, how many ball bearings does the plant make in a single day? (Indicate the number in proper scientific notation with the appropriate number of significant figures.)

There are __________ ng in a pg.

A rectangular water tank is 14.5 cm long and 4.63 cm wide. If 368.5 g of water completely fills the tank, the height of the tank is __________ cm. (Assume the density of water is 1.000 g/ml.)

There should be __________ significant figures in the answer to the following computation.

1.55 kg/m³ is equivalent to __________ g/L.

An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 4.69 g. If the volume of this sphere is less than __________ cm³, then the sphere will sink in liquid mercury (density = 13.6 g/cm³) .

What decimal power does the abbreviation f represent?

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m³ is __________.

__________ significant figures should be retained in the result of the following calculation.

The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take __________ days to travel between the Earth and Moon.

The density of a 167.4 g sample of magnesium having a volume of 96.32 ml is __________ g/cm³.

An iron mine produces 1.67 x 10⁴ tons of raw ore per day. If the ore is 26.39% elemental iron, the mine produces __________ pounds of elemental iron per year. (Assume the mine operates 365 days per year.)

The quantity 1.0 mg/cm² is the same as 1.0 × __________ kg/m².

The symbol for the element mercury is __________.

The temperature of -25 °C is __________ in Kelvins.

The density of mercury is 13.6 g/cm³. The density of mercury is __________ kg/m³.

The density of lead is 11.4 g/cm³. The mass of a lead ball with a radius of 0.50 mm is __________ g.

Quiz 1: Introduction: Matter and Measurement

The symbol for the element calcium is __________.

The symbol for the element magnesium is __________.

The output of a plant is 4335 pounds of ball bearings per week (five days) . If each ball bearing weighs 0.0113 g, how many ball bearings does the plant make in a single day? (Indicate the number in proper scientific notation with the appropriate number of significant figures.)

There are __________ ng in a pg.

A rectangular water tank is 14.5 cm long and 4.63 cm wide. If 368.5 g of water completely fills the tank, the height of the tank is __________ cm. (Assume the density of water is 1.000 g/ml.)

There should be __________ significant figures in the answer to the following computation.

1.55 kg/m3 is equivalent to __________ g/L.

An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 4.69 g. If the volume of this sphere is less than __________ cm3, then the sphere will sink in liquid mercury (density = 13.6 g/cm3) .

What decimal power does the abbreviation f represent?

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m3 is __________.

__________ significant figures should be retained in the result of the following calculation.

The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take __________ days to travel between the Earth and Moon.

The density of a 167.4 g sample of magnesium having a volume of 96.32 ml is __________ g/cm3.

An iron mine produces 1.67 x 104 tons of raw ore per day. If the ore is 26.39% elemental iron, the mine produces __________ pounds of elemental iron per year. (Assume the mine operates 365 days per year.)

The quantity 1.0 mg/cm2 is the same as 1.0 × __________ kg/m2.

The symbol for the element mercury is __________.

The temperature of -25 °C is __________ in Kelvins.

The density of mercury is 13.6 g/cm3. The density of mercury is __________ kg/m3.

The density of lead is 11.4 g/cm3. The mass of a lead ball with a radius of 0.50 mm is __________ g.

1.55 kg/m³ is equivalent to __________ g/L.

An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 4.69 g. If the volume of this sphere is less than __________ cm³, then the sphere will sink in liquid mercury (density = 13.6 g/cm³) .

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m³ is __________.

The density of a 167.4 g sample of magnesium having a volume of 96.32 ml is __________ g/cm³.

An iron mine produces 1.67 x 10⁴ tons of raw ore per day. If the ore is 26.39% elemental iron, the mine produces __________ pounds of elemental iron per year. (Assume the mine operates 365 days per year.)

The quantity 1.0 mg/cm² is the same as 1.0 × __________ kg/m².

The density of mercury is 13.6 g/cm³. The density of mercury is __________ kg/m³.

The density of lead is 11.4 g/cm³. The mass of a lead ball with a radius of 0.50 mm is __________ g.