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TiliK225 [7]
3 years ago
12

How many moles are present in 281 grams of arsenic

Chemistry
1 answer:
Murljashka [212]3 years ago
6 0
The molar mass or As is 74.9g. Start with 281g multiply by (1mol/74.9g) = 3.75 mols

Put what you don’t want on the bottom (in this case grams) so they the u it’s cancel (if you multiply by grams and the divide by grams they cancel. Ultimately leave what you want on the top ( This case mols) then do the math
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PLEASE HELP ME SOLVE THIS.Thank you so much!
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Answer: The coefficients for the given reaction species are 1, 6, 2, 3.

Explanation:

The given reaction equation is as follows.

Cr_{2}O^{2-}_{7} + Cl^{-} \rightarrow Cr^{3+} + Cl_{2}

Now, the two half-reactions can be written as follows.

Reduction half-reaction: Cr_{2}O^{2-}_{7} + 3e^{-} \rightarrow Cr^{3+}

This will be balanced as follows.

Cr_{2}O^{2-}_{7} + 14H^{+} + 6e^{-} \rightarrow 2Cr^{3+} + 7H_{2}O ... (1)

Oxidation half-reaction: Cl^{-} \rightarrow Cl_{2} + 1e^{-}

This will be balanced as follows.

6Cl^{-} \rightarrow 3Cl_{2} + 6e^{-} ... (2)

Adding both equation (1) and (2) we will get the resulting equation as follows.

Cr_{2}O^{2-}_{7} + 14H^{+} + 6Cl^{-} \rightarrow 2Cr^{3+} + 3Cl_{2} + 7H_{2}O

Thus, we can conclude that coefficients for the given reaction species are 1, 6, 2, 3.

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3 years ago
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aleksandrvk [35]

Answer:

optical (optic is the word used for referring to the eye ie optic nerve)

Explanation:

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3 years ago
Which of these is a compound?<br><br> A. Steel<br><br> B.Sugar<br><br> C.Air<br><br> D.Nitrogen
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Sugar is a compound made of carbon, hydrogen and oxygen.

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4 years ago
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A neutralization reaction is a reaction between choose. That results in the formation of choose. And choose.
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Neutralization reaction is the reaction that occur between acid and base.

<h3>What is Neutralization reaction?</h3>

Neutralization reaction is the reaction that take place between acid and base to produce salt and water. For examples HCl react with NaOH to produce NaCl and H2O

Therefore, Neutralization reaction is the reaction between acid and base.

The question is not complete but the option are gotten from another website.

Here are the options.

  • an acid and a base
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  • an acid and a metal
  • a salt and a base

Learn more about neutralization from the link below.

brainly.com/question/4090568

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Which lists the waves in order of frequency, from highest to lowest?
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Radio waves.
microwaves.
infrared waves.
light.
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x-rays.
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