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3 years ago

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A student wants to heat a piece of iron so that its temperature rises by 20 degrees C. What information does she need about the

iron to plan the experiment? A.)Temperature.
B.) Mass. C.) Conductivity. D.) Surface area.

2 answers:

LekaFEV [45]3 years ago

5 0

Mass................

grandymaker [24]3 years ago

4 0

The answer would be B: Mass. :-)

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The solubility of oxygen gas = 1.0 mmol/L (given)

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Converting mmol to mol:

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Since, the density of water is 1.0 g/mL.

$Density = \frac{mass}{volume}$

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Number of moles of water = $\frac{1000 g}{18 g/mol} = 55.55 mol$

Substituting the values in formula (1):

$mole fraction = \frac{0.001}{55.55+0.001}$

$mole fraction = 1.8\times 10^{-5}$

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