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Hunter-Best [27]
3 years ago
14

How many grams are there in 9.4x10^25 molecules of H2

Chemistry
1 answer:
Arisa [49]3 years ago
7 0

Answer:

You start with 9.4 x 1025 molecules of H2.

You know that an Avogadro's number of molecules of H2 has a mass of 2.0 g.

To solve, 9.4 x 1025 molecules H2 x (2.0 g H2 / 6.023 x 1023 molecules H2) = 312. g H2

Explanation:

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In the following chemical reaction, which element is shown to be violating the law of conservation of mass? C3H8 + 4O2 -> 3CO
AlexFokin [52]
Checking if it is balanced:

C             
3               3

H
8                  4*2 = 8

O
8                  3*2   + 4 = 6 + 4 = 10
8                   10

Only O is not balanced.

So O is violating the law.     Option C.

<span>C. O</span>
6 0
3 years ago
BRAINLIEST!!! <br> Is it A or D? <br> Can someone help me?
son4ous [18]

Answer:

A

Explanation:

Hope this helps!

4 0
3 years ago
What are the products in a chemical reaction?
Advocard [28]
The new substances that are produced
4 0
3 years ago
Of protons, neutrons, and electrons, the least massive particle is the electron.is it True or False
const2013 [10]

The least massive particle is the electron. Hence, the option true is correct.

<h3>What are subatomic particles?</h3>

Sub-atomic particles are tiny particles of matter that together constitute an atom. There are three subatomic particles, which are namely electrons, protons and neutrons.

Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron).

Hence, the option true is correct.

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5 0
2 years ago
Carbon dioxide in the atmosphere dissolves in raindrops to produce carbonic acid (H2CO3), causing the pH of clean, unpolluted ra
anastassius [24]

Answer:

The range of [H⁺] is from 2.51 x 10⁻⁶ M to 6.31 x 10⁻⁶ M,

Explanation:

To answer this problem we need to keep in mind the <u>definition of pH</u>:

  • pH = -log [H⁺]

So now we <u>calculate [H⁺] using a pH value of 5.2 and of 5.6</u>:

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-5.2 = log [H⁺]

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6.31 x 10⁻⁶ M = [H⁺]

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10^{-5.6} = [H⁺]

2.51 x 10⁻⁶ M = [H⁺]

6 0
3 years ago
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