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stealth61 [152]
3 years ago
11

How many grams of strontium (Sr, 87.62 g/mol) are in 2.92 moles of strontium?

Chemistry
2 answers:
S_A_V [24]3 years ago
8 0

Answer :The correct answer for mass of Sr is 255.85 g.

Mole :

It can defined as the amount of substance that contains as many entities as present 12 g of Carbon-12 .

In 1 mole of any atom , molecule or ions is equal to its atomic mass , molecular mass or ionic mass respectively .

Mass , molar mass ( or atomic mass or ionic mass ) and mole can be related as :

Mole(mol) = \frac{ given mass (g)}{molar mass (\frac{g}{mol})}

Given :

Molar mass of Strontium = 87.62\frac{g}{mol}

Mole of Strontium = 2.92 mol

Plugging these values in Mole formula :

2.92 mol = \frac{mass of Sr }{87.62 \frac{g}{mol}}

Multiplying both side by 87.62\frac{g}{mol}

2.92 mol * 87.62 \frac{g}{mol}= \frac{mass of Sr }{87.62 \frac{g}{mol}}  * 87.62 \frac{g}{mol}

Mass of Sr = 255.85 g


kherson [118]3 years ago
3 0
Mass= number of mole *Molar mass
mass =2.92 mol*87.62 g/mol≈256 g
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Alex17521 [72]

Answer:

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

Explanation:

When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.

We usually balance O and H atoms last.

AsCl₃ + H₂S → As₂S₃ +HCl

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2 AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

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H --- 2

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<u>products</u>

As --- 2

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The number of As atoms is now balanced.

2 AsCl₃ + 3 H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 1

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The number of S atoms is now equal on both sides.

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

<u>reactants</u>

As --- 2

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H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

The equation is now balanced.

3 0
2 years ago
Identify the decomposition reaction. 2nh3 + h2so4 ⟶ (nh4)2so4 2nabr + ca(oh)2 ⟶ cabr2 + 2naoh 2 no2 ⟶ 2 o2 + n2 3pb + 2h3po4 ⟶ 3
TEA [102]

A decomposition reaction should look like

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7 0
3 years ago
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Answer:

B: Increasing the volume inside the reaction chamber

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5 0
3 years ago
In a 51.0-g aqueous solution of methanol ch4o the mole fraction of methanol is 0.270. what is the mass of each component?
gladu [14]
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Hope this answers the question. Have a nice day.</span>
4 0
3 years ago
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3241004551 [841]

Answer:

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Explanation:

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Hence, the correct option is H2.

5 0
2 years ago
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