2 years ago

Im confused! Can someone please show me the step by step process??

1 answer:

NeX [460]2 years ago

3 0

The formula for finding the volume is Length x Width x Height. Multiply the three numbers and show your work

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DiKsa [7]

The substance is a solid

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2 years ago

Hatshy [7]

Answer:

25 possibly

Explanation:

I'm not too sure about this, but sodium oxide is Na2O, 2 sodium and 1 oxygen, so 12.5g * 2 is 25

If someone else comes up with a more convincing argument listen to them

4 0

3 years ago

Anarel [89]

Paint changes color to the physical eye.

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3 years ago

Elena-2011 [213]

Answer:

The lattice energy is the energy required for the atoms of an element to attract to each other therefore making it a solid

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3 years ago

lozanna [386]

Answer:

The correct answer is option E.

Explanation:

$2Fe_2O_3\rightarrow 4Fe + 3O_2 \Delta H^o_{rxn} = 824.2 kJ$

Mass of ferric oxide decomposed = 57.0 g

Moles of ferric oxide decomposed = $\frac{57.0 g}{160 g/mol}=0.35625 mol$

According to reaction, 2 moles ferric oxide on combustion gives 824.2 kJ of heat.

Then heat given by on decomposition of 0.35625 mol of ferric oxide will be:

$\frac{824.2 kJ}{2}\times 0.35625 =146.81 kJ\approx 147 kJ$

So, on decomposition of 57.0 grams of ferric oxide 147 kilo Joules of heat was released.

3 0

3 years ago