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olga55 [171]
3 years ago
13

A chemistry student needs of isopropenylbenzene for an experiment. He has available of a w/w solution of isopropenylbenzene in a

cetone. Calculate the mass of solution the student should use. If there's not enough solution, press the "No solution" button.
Chemistry
1 answer:
Lera25 [3.4K]3 years ago
8 0

Question:

A chemistry student needs of 10 g isopropenylbenzene for an experiment. He has available 120 g of a 42.7% w/w solution of isopropenylbenzene in acetone. Calculate the mass of solution the student should use. If there's not enough solution, press the "No solution" button.

Answer:

The answer to the question is as follows

The mass of solution the student should use is 23.42 g.

Explanation:

To solve the question we note the following

A solution containing 42.7 % w/w of isopropenylbenzene in acetone  has 42.7 g of isopropenylbenzene in 100 grams of the solution

Therefore we have 10 g of isopropenylbenzene contained in

100 g * 10 g/ 42.7 g = 23.42 g of solution

Available solution = 120 g

Therefore the quantity to used from the available solution = 23.42 g of the isopropenylbenzene in acetone solution.

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Calculate the mass of iron(III) oxide that contains a million iron atoms. Be sure your answer has a unit symbol if necessary, an
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<u>Answer:</u> The mass of iron (II) oxide that contains a million iron atoms is 2.6\times 10^{-17}g

<u>Explanation:</u>

We are given:

Number of iron atoms = A million = 1.0\times 10^6

The chemical formula of the given compound is Fe_2O_3

It is formed by the combination of 2 iron atoms and 3 oxygen atoms.

According to mole concept:

1 mole of a compound contains 6.022\times 10^{23} number of particles

1 mole of iron (II) oxide will contain = (2\times 6.022\times 10^{23})=1.2044\times 10^{24} number of iron atoms

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Molar mass of iron (II) oxide = 159.7 g/mol

Applying unitary method:

For 1.2044\times 10^{24} number of iron atoms, the mass of iron (II) oxide is 159.7 g

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2FeCl3 + MgO -&gt; Fe2O3 + 3MgCl2<br> Convert 3.00 moles of MgO to moles of Fe2O3
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brainly.com/question/13981579

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