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2 years ago

Who created the movie Aladdin?

Chemistry

1 answer:

Lana71 [14]2 years ago

6 0

Answer:

Ron Clements and John Musker

Explanation:

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For this reaction: 4 Al + 3O2 = 2 Al2O3

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0.347 mols, working out shown on photo

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3 years ago

Duncan knows that it takes 36400 cal of energy to heat a pint of water from room temperature to boiling. However, Duncan has pre

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3 years ago

What is the overall charge of a Aluminum atom that loses 3 electrons

Rudik [331]

It’s charge was neutral due to the equal number of protons and electrons. when it becomes an ion it loses 3 electrons leaving behind only 10. the answer is 10. the equation is +13 +(-10)=+3

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2 years ago

To find the atomic mass of an atom we add protons and electrons true or false

Zanzabum

False

The atomic mass equals the protons plus the neutrons

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3 years ago

An elemental analysis is performed in an unknown compound. It is found to contain 40.0 % mass in Carbon, 6.71% mass in Hydrogen,

DENIUS [597]

Answer: Molecular formula will be $C_3H_6O_3$

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of C= 40 g

Mass of H = 6.71 g

Mass of O = 100 - (40+6.71 ) = 53.29 g

Step 1 : convert given masses into moles.

Moles of C = $\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{40g}{12g/mole}=3.33moles$

Moles of H = $\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{6.71g}{1g/mole}=6.71moles$

Moles of O = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{53.29g}{16g/mole}=3.33moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = $\frac{3.33}{3.33}=1$

For H = $\frac{6.71}{3.33}=2$

For O = $\frac{3.33}{3.33}=1$

The ratio of C: H: O= 1 : 2: 1

Hence the empirical formula is $CH_2O$

The empirical weight of $CH_2O$ = 1(12)+2(1)+1(16)= 30g.

The molecular weight = 90.08 g/mole

Now we have to calculate the molecular formula:

$n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{90.08}{30}=3$

The molecular formula will be= $3\times CH_2O=C_3H_6O_3$

Molecular formula will be $C_3H_6O_3$

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3 years ago