Chemistry, 06.08.2021 22:40 azibur3191

What is the mass of 7.2 moles of titanium to the nearest tenth?

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Answer from: theman300045

7.2 moles of titanium weigh 344.736 grams.

Explanation:

Molar mass of titanium = 47.88 g

$1 \: mole \: of \: titanium = 47.88 \: grams \\ 7.2 \: moles \: of \: titanium = g$

solve for g

$g = ( \frac{7.2 \times 47.88}{1} ) \\ g = 344.736 \: grams$

Answer from: alex7881

$\boxed {\boxed {\sf 344.7 \ g \ Ti}}$

Explanation:

We are asked to find the mass of 7.2 moles of titanium.

To convert from moles to grams, we use the molar mass. This value is the mass of 1 mole of a substance. They are equivalent to the atomic masses found on the Periodic Table, but the units are grams per moles instead of atomic mass units.

Look up titanium's molar mass on the Periodic Table.

Ti: 47.87 g/mol

Convert moles to grams using dimensional analysis. First, set up a ratio using the molar mass.

$\frac {47.87 \ g \ Ti}{1 \ mol \ Ti}$

We are converting 7.2 moles to grams, so we multiply the ratio by this value.

$7.2 \ mol \ Ti *\frac {47.87 \ g \ Ti}{1 \ mol \ Ti}$

The units of moles of titanium cancel.

$7.2 *\frac {47.87 \ g \ Ti}{1 }$

The denominator of 1 can be ignored (a number over 1 is just the number).

$7.2 *47.87 \ g \ Ti}$

$344.664 \ g \ Ti$

We are asked to round to the nearest tenth. The 6 in the hundredth place tells us to round the 6 in the tenth place up to a 7.

$344.7 \ g \ Ti$

There are approximately 344.7 grams of titanium in 7.2 moles of titanium.

Answer from: Quest

Mass is the amount of matter in an object. weight is the measurement of the pull of gravity on an object. say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165) now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon. however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant. in conclusion it is possible for your weight to change as your mass remains constant.

Answer from: Quest

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

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