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2 years ago

Solve without using a calculator. Substance ab2 is 60.0% a by mass. What is the percent a by mass for substance ab?

Chemistry

1 answer:

Orlov [11]2 years ago

5 0

The percent A by mass for substance AB =<u> 75%</u>

<h3>Further explanation</h3>

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements

Empirical formula is the mole ratio of compounds forming elements.

From Substance AB₂ is 60.0% A by mass.

Let's say that AB₂ mass = 100 gram, then

mass A = 60 gram

mass B = 40 gram : 2 (coefficient in compound AB₂ = 2) = 20 gram

In compound AB:

Total mass = mass A + mass B

Total mass = 60 + 20 grams = 80 grams

Then the percentage of compound A = (60: 80) = 75%

<h3>Learn more</h3>

Grams of KO₂ needed to form O₂

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Keywords : percent mass, substance

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Answer:

1.6 L

Explanation:

Using Charle's law

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Given ,

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The conversion of T( °C) to T(K) is shown below:

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So,

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2 years ago

Vinegar is a solution of acetic acid (the solute) in water (the solvent) with a solution density of 1010 g/L. If vinegar is 0.80

Damm [24]

Answer:

4.8 %

Explanation:

We are asked the concentration in % by mass, given the molarity of the solution and its density.

0.8 molar solution means that we have 0.80 moles of acetic acid in 1 liter of solution. If we convert the moles of acetic acid to grams, and the 1 liter solution to grams, since we are given the density of solution, we will have the values necessary to calculate the % by mass:

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mass of solution = 1000 cm³ x 1.010 g/ cm³ (1l= 1000 cm³)

= 1010 g

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1 year ago

A single cell undergoes mitosis every five minutes. How many cells will result from this cell in 15 minutes? In 30 minutes?

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2 years ago

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natta225 [31]

Answer:
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2 years ago

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vladimir2022 [97]

Answer:

Explanation:

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