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3 years ago

PLEASE HELP ME ASAP!! How many molecules are in 7.5 grams of Oxygen gas?

1 answer:

4 0

It is about 6 x 10^23. So in 5 moles of oxygen gas, which has a mass of 5x16=80 grams, there are 5x6x10^23 = 30x10^23 molecules.

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Sibling rivalry may occur when:

sweet [91]

Answer:

Explanation: true

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3 years ago

In the reaction between Lithium Sulfate and an excess of Lead (II) Nitrate, how many molecules of Lithium Nitrate can be expecte

siniylev [52]

Answer:

$1.46x10^{23}molecules \ LiNO_3$

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$Li_2SO_4 + Pb(NO_3)_2 \rightarrow PbSO_4+2LiNO_3$

Thus, since lead (II) nitrate is in excess, we can directly compute the moles of lithium nitrate by applying the 1:2 molar ratio between them in the chemical reaction as well as the molar mass of Lithium Sulfate that is 110 g/mol for the stoichiometric shown below factor:

$n_{LiNO_3}=13.3gLi_2SO_4*\frac{1molLi_2SO_4}{110gLi_2SO_4} *\frac{2molLiNO_3}{1molLi_2SO_4} =0.242molLiNO_3$

Finally, by using the Avogadro's number we are able to compute the molecules:

$0.242molLiNO_3*\frac{6.022x10^{23}molecules\ LiNO_3}{1mol}=1.46x10^{23}molecules \ LiNO_3$

Best regards.

5 0

4 years ago

Read 2 more answers

If I have one mole of sulfur, how many atoms would that be?

krok68 [10]

Answer:

Atoms of sulfur = 9.60⋅g32.06⋅g⋅mol−1×6.022×1023⋅mol−1

Explanation:

because the units all cancel out, the answer is clearly a number, ≅2×1023 as required.

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4 years ago

How many atoms of each element are in one molecule of the product?

ollegr [7]

Answer:

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3 years ago

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Which characteristics describe bacteria? Check all that apply. are microscopic are single celled are multicelled have shapes tha

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Answer:

Are microscopic

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4 0

4 years ago