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Salsk061 [2.6K]
3 years ago
13

HURRY ANSWER NOW AND I GIVE BRAINLY!!! HURYYY

Chemistry
1 answer:
s344n2d4d5 [400]3 years ago
5 0
When the student left the jar outside, the molecules were moving around each other. Later, the molecules were moving away from each other.
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What is that the theoretical yield of aluminum oxide I if 3.20 mol of aluminum metal is exposed to 2.70 mole of oxygen
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Answer:

163.2g

Explanation:

First let us generate a balanced equation for the reaction. This is shown below:

4Al + 3O2 —> 2Al2O3

From the question given, were were told that 3.2moles of aluminium was exposed to 2.7moles of oxygen. Judging by this, oxygen is excess.

From the equation,

4moles of Al produced 2moles of Al2O3.

Therefore, 3.2moles of Al will produce = (3.2x2)/4 = 1.6mol of Al2O3.

Now, let us covert 1.6mol of Al2O3 to obtain the theoretical yield. This is illustrated below:

Mole of Al2O3 = 1.6mole

Molar Mass of Al2O3 = (27x2) + (16x3) = 54 + 48 =102g/mol

Mass of Al2O3 =?

Number of mole = Mass /Molar Mass

Mass = number of mole x molar Mass

Mass of Al2O3 = 1.6 x 102 = 163.2g

Therefore the theoretical of Al2O3 is 163.2g

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555mL of gas is combined at standard temperature and pressure(STP). The volume changes to 660.mL at 30.5 °C. What is the new pre
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Answer:0.94

Explanation:

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The symbol of an element is represented by (a) Calculate the number of neutrons in the atom of X. [1mark] (b) State the number o
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Answer:

The question is incomplete.

A sample question and solution is given below.

Check the attachment for explanation.

Explanation:

Check the attachment below

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