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Leya [2.2K]
3 years ago
7

What is the percent composition of each of the elements in Al(OH) 3 ?

Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
5 0

Answer:

78%

Explanation:

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How many moles are in 458 grams of na2so4
shtirl [24]

# moles = mass (g) / Mr (relative atomic mass)

# moles = 458 / ((23*2)+32+(16*4)

# moles= 458 /  142 = 3.2253521126760...

= 3.23 moles

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3 years ago
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Free_Kalibri [48]

Answer:

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Explanation:

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3 years ago
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What is the mass of silver (107.87 g/mol) produced by the reaction of 3.00 moles of copper with 3.00 moles of silver nitrate?Cu
vladimir2022 [97]

Answer: 323.61 g of Ag will be produced

Explanation:

The given balanced chemical reaction is :

Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag

According to stoichiometry :

2 moles of AgNO_3 require 1 mole of Cu

Thus 3.00 moles of  AgNO_3 will require=\frac{1}{2}\times 3.00=1.50moles  of Cu

Thus AgNO_3 is the limiting reagent as it limits the formation of product.

As 2 moles of AgNO_3 give =  2 moles of Ag

Thus 3.00 moles of AgNO_3 give =\frac{2}{2}\times 3.00=3.00moles  of Ag

Mass of Ag=moles\times {\text {Molar mass}}=3.00moles\times 107.87g/mol=323.61g

Thus 323.61 g of Ag will be produced from the given moles of both reactants.

3 0
3 years ago
What is required for two atoms to share electrons equally in a chemical bond?
natulia [17]

Answer:

B

Explanation:

It said there "share electrons" so the two atoms should be non-metals

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Which of these substances is commonly refined by electrolysis?...
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