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In-s [12.5K]
3 years ago
12

When you knock on a door, what causes you to hear a sound?

Chemistry
1 answer:
I am Lyosha [343]3 years ago
3 0

Answer: B.

Explanation:

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How many diatomic molecules are there? List all of them
wariber [46]

Answer: Br2 I2 N2 Cl2 H2 O2 F2 (7 elements)

Explanation:

How to remeber this: Hal-NOH or BrINCIHOF

halogens Nitrogen, Oxygen, and Hydrogen.

7 0
3 years ago
A gas at constant temperature is enclosed in a container with a movable piston. It occupies a space of 10L at a pressure of 500
Liula [17]

Answer:

4.17L

Explanation:

V1 = 10L

V2 =?

P1 = 500torr

P2 = 1200torr

Boyle's law states that at constant temperature, the volume of a gas is inversely proportional to its pressure.

P1V1 = P2V2

V2 = ( P1 * V1 ) / P2

V2 = 4.17L

The new volume of the gas is 4.17L

8 0
3 years ago
THIS IS DUE TODAY IF YOU HELP I WILL GIVE BRAINLIEST
sp2606 [1]

Answer:19. He says that he’s been really tired since several weeks ago. 20. A friend of us is going to pick us up at the airport. 21. I’ve worked like a waiter in the past, but I wouldn’t want to do it again. 22

Explanation:

7 0
2 years ago
A 2.5 mg sample of magnesium powder is ignited with 2 mg oxygen in a sealed container. All of the magnesium is consumed and 4.15
lys-0071 [83]

Answer:

Total mass of the reactant = 2+2.5 =4.5 mg

Total mass of product = 4.15 mg

therefore, mass of unreacted oxygen = 4.50-4.15 = 0.35 g

7 0
4 years ago
A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?
Inessa [10]

A sample of a compound contains 60.0 g C and 5.05 g H.

divide by molar mass of C(12) and H(1) to get molar ratio

C: 60/12=5 and H: 5/1=5

so C:H=5:5=1:1

total molar mass=78

divide by 1C+1H to find the formula: 78/(12+1)=78/13=6

compound is C6H6


5 0
3 years ago
Read 2 more answers
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