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3 years ago

7

Does a large or small body cool faster?

1 answer:

Nataly [62]3 years ago

8 0

Answer:

SO… The larger wire looses heat energy faster, however the smaller wire decreases temperature faster. ... Their surface area is much larger in proportion to their body mass and they lose heat through their skin when it is cold and they gain heat through their skin when it is hot much faster than an adult does.

Explanation:

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Calculate the number of water (H2O) molecules produced from the decomposition of 75.50 grams of Iron (III) hydroxide (Fe(OH)3).

Phantasy [73]

Answer: $6.38\times 10^{23}$ molecules of water are produced.

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} Fe(OH)_3=\frac{75.50g}{106.8g/mol}=0.707moles$

The balanced chemical reaction is:

$2Fe(OH)_3\rightarrow Fe_2O_3+3H_2O$

According to stoichiometry :

2 moles of $Fe_2O_3$ produce = 3 moles of $H_2O$

Thus 0.707 moles of $Fe_2O_3$ will produce= $\frac{3}{2}\times 0.707=1.06moles$ of $H_2O$

According to avogadro's law, 1 mole of every substance contains avogadro's number $6.023\times 10^{23}$ of particles.

Thus 1.06 moles of $H_2O$ contains = $\frac{6.023\times 10^{23}}{1}\times 1.06=6.38\times 10^{23}$ molecules

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