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Aleks04 [339]
3 years ago
12

What is the mass percent composition of an element in a molecule?

Chemistry
2 answers:
Burka [1]3 years ago
7 0

Answer:

<em>b </em>

Explanation:

<em>a p e x :)</em>

Minchanka [31]3 years ago
6 0

Answer:

Try B. The fraction of the molecules mass that comes from one atom of the element

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What is the Molar Mass of Cs2SO3?​
Airida [17]

Answer:

345.89 g/mol

Explanation:

To find the molar mass, find the atomic mass of all the elements from a periodic table.

Cs - 132.91 × 2 = 265.82

S - 32.07

O - 16.00 × 3 = 48.00

Now add them all together.

265.82 + 32.07 + 48.00 = 345.89 g/mol

Hope that helps.

8 0
3 years ago
Convert 7.50 mol of Li₂O to grams
Natali5045456 [20]

Answer:

223.5 g

Explanation:

The formula between the number of moles, mass and Mr can be used to convert moles to grams.

<em>Number of moles = mass ÷ Mr</em>

So, mass = number of moles × Mr

  Mr of Li₂O = (6.9 × 2) + 16 = 29.8

∴ Mass = 7.5 × 29.8 = <u>223.5 g</u>

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