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nata0808 [166]
4 years ago
10

What is 140.2 in scientific notation

Chemistry
2 answers:
Vilka [71]4 years ago
5 0

1.402 \:  \times  \:  {10}^{2}

Akimi4 [234]4 years ago
4 0

Answer:

1.402 * 10^2.

Explanation:

There are 3 digits before the decimal point so the exponent is 2.

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prohojiy [21]

The volume of O₂ : 21 L

<h3>Further explanation</h3>

Given

8.7 grams of C₂H₄

Required

Volume O₂

Solution

Reaction

C₂H₄ + 3 O₂ ⇒ 2 CO₂ + 2 H₂O

mol C₂H₄(MW= 28 g/mol) :

= mass : MW

= 8.7 g : 28 g/mol

= 0.311

From the equation, mol  O₂ :

= 3/1 x mol C₂H₄

= 3/1 x 0.311

= 0.933

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= 0.933 x 22.4 L

= 20.899 L ≈ 21 L

6 0
3 years ago
Calculate the mass of 20.0 moles of He (in g)
Daniel [21]

Explanation:

20.0 moles= 80.1 or 80.05g

5.00 moles= 20.0g

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1.00 moles= 4.00g

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7 0
3 years ago
Which of the following is a inert gas?<br>oxygen<br>chlorine<br>nitrogen<br>aragon​
Sophie [7]

Answer:

argon is an inert gas

Explanation:

an inert gas is when a chemical helium, xenon, neon, krypton, radon are also inert gases

5 0
3 years ago
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