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Hunter-Best [27]
3 years ago
7

Which expression gives the mass percent of carbon in methanoic (formic) acid, HCOOH?12/46 x 10012/29 x 10016/46 x 1002/46 x 100

Chemistry
1 answer:
prohojiy [21]3 years ago
3 0

Answer:

\frac{12}{46}\times100

Explanation:

Molecular mass of methanoic acid (HCOOH) = 2*1 + 1*12 + 2*16

                                                                              =46 grams

mass of 1 mole of hydrogen atom = 1  g

mass of 1 mole carbon atom = 12 g

mass of 1 mole of oxygen atom = 16 g

mass of 1 mole of HCOOH = 46 g

1 mole of HCOOH molecule contains 1 mole of carbon atoms

means in 46 g of HCOOH there is 12 g of carbon atoms.

Percentage of carbon in methanoic acid = \frac{12}{46}\times100

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Based on their percent concentration, the 5% sugar solution contains more water.

<h3>What is the concertation of a solution?</h3>

The concentration of a solution is the amount of solute dissolved or present in a given volume of solution.

Concentration of solutions can be expressed as either:

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The concentration of the sugar solutions are given as percent concentration.

The 5% sugar solution contains 5% sugar and 95% water

The 10% sugar solution contains 10% sugar and 90% water.

Therefore, the 5% sugar solution contains more water.

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3 0
2 years ago
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4 0
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A volume of 25cm3 of a carbonate solution of concentration 0.2mol dm-3 was neutralized by 20 cm3 of acid of concentration 0.5 mo
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7 0
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The answer to your question is No, it is not.

Explanation:

Data

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In a double replacement reaction, two reactants interchange cations an example of these reactions are neutralization reactions. In neutralization reactions, an acid and a base react to form a salt and water.

The reaction of this problem is not a double replacement reaction because the products are carbon dioxide and water, not a salt and water.

The reaction of this problem is a combustion reaction.

8 0
4 years ago
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