Question 1

The estimated mass of the planet Jupiter is 1.90 × 10²⁷ kg and the density is believed to be 1.34 g/cm³.If Jupiter were a perfect sphere,what would be its diameter?

Accepted Answer

The answer of The estimated mass of the planet Jupiter...

Question 2

If the melting point of titanium metal is 1672°C,what is its melting point in Kelvins?

Accepted Answer

The melting point in Kelvins is calculated by adding 273 to the Celsius temperature: 1672°C + 273 = 1945 K.

Question 3

What is the coldest temperature possible?

Accepted Answer

0 K is the absolute zero temperature, equivalent to -273.15°C or -459.67°F. It is the temperature at which all matter would have zero thermal energy and molecular motion would cease. Therefore, it is considered as the coldest temperature possible.

Question 4

The density of mercury is 13.5 g/mL.What is the mass in kg of mercury that fills a 0.250-L flask?

Accepted Answer

We can use the formula:
mass = density x volume
= 13.5 g/mL x 0.250 L
= 3.375 g
Converting grams to kilograms:
= 0.003375 kg
Therefore, the mass of mercury that fills the flask is 0.003375 kg or 3.38 kg, which is closest to option B.

Question 5

The freezing point of methane is -295°F and the boiling point is -263°F.The temperature of the surface of Titan,a moon of Saturn,is 93 K.If methane exists on Titan,it is

Accepted Answer

The answer of The freezing point of methane is -295°F...

Question 6

Which one of the following statements about temperature scales is false?

Accepted Answer

The Celsius degree is actually larger than the Fahrenheit degree. The freezing point of water on the Fahrenheit scale is 32 degrees.

Question 7

Convert 100 cm³ to m³.

Accepted Answer

100 cm³ is equal to 100 × 10⁻⁶ m³, which simplifies to 1 × 10⁻⁴ m³.

Question 8

Convert 15 m³ to liters.

Accepted Answer

1 cubic meter is equivalent to 1,000 liters. Therefore, 15 cubic meters is equal to 15,000 liters, which is 15 × 10^3 L or 1.5 × 10^4 L.

Question 9

Which of the following is the lowest temperature?

Accepted Answer

To compare temperatures given in different units, we need to convert them to the same unit.

37°C = 98.6°F (body temperature)

313 K = 104°F

54°F is the lowest temperature among the given options.

Question 10

The density of copper is 8.96 g/cm³.What is the mass in mg of a cube of copper that measures 2.31 mm on each side?

Accepted Answer

First, we need to convert the given density from g/cm³ to mg/mm³:

8.96 g/cm³ = 8,960 mg/cm³
1 cm³ = 1,000 mm³
Therefore, 8,960 mg/cm³ = 8.96 mg/mm³

Now, we can calculate the volume of the cube:

2.31 mm x 2.31 mm x 2.31 mm = 12.120291 mm³

Finally, we can calculate the mass of the cube using the density and volume:

8.96 mg/mm³ x 12.120291 mm³ = 108.57180736 mg

Rounding to the nearest milligram, the answer is 110 mg, which corresponds to choice B.

Question 11

The density of aluminum is 2.702 g/cm³.What is the final liquid level of water if 1.130 ounces of aluminum is dropped into a graduated cylinder containing 15.90 mL of water?

Accepted Answer

The answer of The density of aluminum is 2.702 g/cm³.What...

Question 12

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.If the density of water is 0.990 g/mL at 45°C,how many kilograms of water are required for a person to walk 30 kilometers in Death Valley?

Accepted Answer

First, convert 30 kilometers to miles (1 mile = 1.60934 kilometers), which gives approximately 18.64 miles. Since a visitor requires about one quart of water for every two miles, this means they would need about 9.32 quarts for 18.64 miles. Since there are approximately 0.946 liters in a quart and 1 liter of water at 45°C weighs approximately 0.990 kg (given density), the total weight of water required is 9.32 quarts * 0.946 liters/quart * 0.990 kg/liter ≈ 8.7 kg.

Question 13

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 and the density of ethanol is 0.789 g/mL.

Accepted Answer

To find the volume of ethanol, first calculate the mass of mercury using its density: mass = volume × density = 0.750 L × 13.546 g/mL = 10159.5 g. Then, use the mass and the density of ethanol to find its volume: volume = mass / density = 10159.5 g / 0.789 g/mL = 12880.1 mL = 12.9 L.

Question 14

Which of the following is the smallest volume?

Accepted Answer

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

Question 15

Which of the following volumes is equal to 10 mL?

Accepted Answer

1 milliliter (mL) is equal to 1 cubic centimeter (cm³), so 10 mL is equal to 10 cm³.

Question 16

A gold ingot weighs 5.50 lbs.If the density of gold is 19.31 g/cm³,and the length and width of the ingot are 12.0 cm and 3.00 cm respectively,what is the height of the ingot?

Accepted Answer

First, we need to find the volume of the gold ingot:

Density of gold = mass/volume
19.31 g/cm^3 = (5.50 lbs) * (453.59 g/lb) / volume

Solving for the volume:
volume = (5.50 lbs) * (453.59 g/lb) / (19.31 g/cm^3) = 0.129 L = 129 cm^3

The volume of a rectangular solid is given by V = l * w * h, where l is the length, w is the width, and h is the height. We know that l = 12.0 cm and w = 3.00 cm. Solving for h:

h = V / (l * w) = 129 cm^3 / (12.0 cm * 3.00 cm) = 3.59 cm

Therefore, the height of the gold ingot is 3.59 cm, which is answer choice B.

Question 17

The volume of a well is 40.0 ft³.How many kilograms of concrete will it take to fill the well if the density of concrete is 2.85 g/cm³?

Accepted Answer

The answer of The volume of a well is 40.0...

Question 18

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?

Accepted Answer

To find the density of the ore, we need to use the formula:

density = mass/volume

We know the mass of the ore is 8.25 g. To find the volume of the ore, we need to find the volume of water displaced by the ore when it was submerged in the graduated cylinder.

The volume of water displaced is equal to the difference between the final volume and the initial volume.

Volume of water displaced = final volume - initial volume = 26.47 mL - 21.25 mL = 5.22 mL

Now, we can find the density of the ore:

density = mass/volume = 8.25 g/5.22 mL = 1.58 g/mL

Therefore, the answer is (C) 1.58 g/mL.

Question 19

The nighttime and daytime temperatures on Mercury are 13 K and 683 K respectively.The melting point and boiling point of sulfur is 246°F and 832°F.Which of the following statements is true? On Mercury sulfur exists

Accepted Answer

Mercury's extreme temperatures allow sulfur to exist in both liquid and solid states. At night (13 K), sulfur is solid, and during the day (683 K), it can melt into a liquid, given sulfur's melting point (246°F or 119°C, equivalent to 392 K) and boiling point (832°F or 444°C, equivalent to 717 K).

Question 20

One liter is approximately the same as one U.S.

Accepted Answer

One liter is approximately equal to one U.S. quart.

Quiz 1: Chemistry: Matter and Measurement

The estimated mass of the planet Jupiter is 1.90 × 1027 kg and the density is believed to be 1.34 g/cm3.If Jupiter were a perfect sphere,what would be its diameter?