At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.07 m by 3.00 m by 3.77 m? Answer in units of kg.

Answers

Answer 1

Answer: 1 ml = 1 cm3
The volume of the room is 34.7217 m3 or 34.721.700 cm3, so 34.721.700 * 0.001184 g/cm3= 41,1104928 kg.

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It has been proposed that North America is moving west at about 2 cm per year. How many kilometers would it move in 5,000 years? (Note: 2 cm is a measurement so your final answer should have significant figure rules applied.)

Answers

Answer: 0.1 km

Explanation:

1) Multiply the rate (speed) by the time: 2 cm / year × 5,000 year = 10,000 cm

2) Convert cm to km, using these well know conversion factors:

1 km = 1,000 m

1 m = 100 cm

⇒ 10,000 cm × [1 m / 100 cm] × [1 km / 1,000 m] = 0.1 km

Well it would move 10,000cm so converting that into km would be it would move 0.1km

When a voltaic cell operates ions move through the

Answers

When a voltaic cell operates, ions move through a salt bridge. The presence of the salt bridge completes the circuit because it promotes ion flow. It maintains the charges balance since the electron are moving from a half cell to another.

The amount of energy that must be absorbed or lost to raise or lower the temperature of 1 g of liquid water by 1°C _____. See Concept 3.2 (Page)

Answers

Answer:

Specific heat capacity

Explanation:

Heat capacity is defined as amount of the heat supplied or absorbed by the given mass of the material so to make a unit change in the material's temperature.

The SI unit is Joule / kelvin (J/K).

It is an extensive property.

While,

Specific heat capacity is the amount of heat absorbed or lost by one gram of mass of the substance to raise it's temperature by 1°C or 1 K

It is an intensive property.

Which of the following elements have the same number of valence electrons?l. nitrogen (N)
ll. oxygen (O)
lll. fluorine (F)
lv. sulfur (S)
v. selenium (Se)

A. IV, and V
B. I, II, and III
C. I, II, and IV
D. II, IV, and V

Answers

The answer is II. Oxygen, IV. Sulfur, and V. Selenium.

Explanation:

Going down the list that was provided, we can use the periodic table of elements to determine the valence electrons.

- Nitrogen has 5 valence electrons

- Oxygen has 6 valence electrons

- Fluorine has 7 valence electrons

- Sulfur has 6 valence electrons

- Selenium has 6 valence electrons

Since oxygen, sulfur, and selenium all have 6 valence electrons, then that is the correct answer.

I hope this helps you!

In a _________the molecules are very close together

Answers

Is a solid because liquids are not is not that close and gas is very far apart.

Answer:

solid

Explanation:

A car starts from rest and reaches a top speed of 80 m/s. If the car did this is 20 seconds . What is the acceleration ?

Answers

80 m/s divided by 20 seconds is 4 m/s so the acceleration is 4 m/s

somethingExplanation:

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