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Lerok [7]
4 years ago
14

How many molecules are there in 21.6 grams of CH4?

Chemistry
1 answer:
crimeas [40]4 years ago
7 0
See attachement for the answer to your question.

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When the equation H202 + H2O + O2 is completely balanced, the SUM of all the coefficients will be
Leviafan [203]
Answer: 1. 5
2H202 -> 2H2O + O2 ; 2 + 2 +1 = 5
7 0
3 years ago
A 500. mL gas sample is collected over water at a pressure of 740 mmHg and 25.0 °C. What is the volume of the dry gas at STP?
Lera25 [3.4K]

Answer:

Volume of dry gas at STP = 0.432 liters or 432 ml

Explanation:

Given:

Pressure (P) = 740 mmHg - 24 mmHg = 716 mmHg

Temperature (t) = 25 degrees C + 273 K = 298 K

500 ml = 0.5 l

Find:

Volume of dry gas at STP

Computation:

[P1][V1] / T1 = [P2][V2] / T2

[716][0.5] / 298 K = [760][ x Liters] / 273 K

x = 0.432 Liters

Volume of dry gas at STP = 0.432 liters or 432 ml

7 0
4 years ago
The period of daylight experienced each day on every part of Earth would be shorter if which one of the following changes occurr
lilavasa [31]

Answer:

c

Explanation:

5 0
3 years ago
Can someone please explain this to me? I need help ​
Vladimir [108]

Answer:

The order would be: X-Rays, Visible Light, and Infrared Waves.

X-Rays have the shortest wavelength out of all three, then Visible Light, and Infrared Waves have the longest wavelength of the three.

Explanation:

So basically, the LONGER the wavelength, the lower the energy. and the SHORTER the wavelength, the higher the energy. For example, Radio waves are the WEAKEST out of all the types of waves because they have the LONGEST wavelengths. Gamma Rays are the STRONGEST out of all the types of waves because they have the SHORTEST wavelengths. So Radio Waves have the lowest energy, and Gamma Rays have the highest energy.

Here is a list of all the types of waves in order from shortest wavelength to longest wavelengths:

Gamma Rays (Shortest Wavelengths, High Energy), then X-Rays would be the second strongest, then Ultraviolet waves, then Visible Light, then Infrared waves, then Microwaves, and lastly Radio Waves (Longest Wavelengths, Low Energy).

6 0
3 years ago
Read 2 more answers
Many of the stars we see in the night sky are called blue giants. They put out more energy and burn millions of times brighter t
Bumek [7]

Answer:

Because it is closer to earth than the other blue giant stars.

Explanation:

The sun is closer to earth than any other big star which means we see it bigger.

6 0
3 years ago
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