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AfilCa [17]
2 years ago
10

Arch

Chemistry
1 answer:
Marat540 [252]2 years ago
4 0

Answer:

the results of the investigation led to new scientific questions

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Diano4ka-milaya [45]
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7. Pistil
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4 0
4 years ago
What mass of Al2(SO4)3 results from mixing 12.93 g of AlCl3 with 10.34 g of (NH4)2SO3 as shown with a 54.2% yield?
avanturin [10]

Mass of Al₂(SO₄)₃ : 4.822 g

<h3>Further explanation  </h3>

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.  

Reaction

2AlCl₃ + 3(NH₄)₂SO₄⇒Al₂(SO₄)₃+ 6NH₄Cl

MW AlCl₃ :133,34 g/mol

MW (NH₄)₂SO₄ : 132,14 g/mol

MW Al₂(SO₄)₃ : 342,15 g/mol

mol  AlCl₃

\tt mol=\dfrac{12.93}{133.34}=0.097

mol (NH₄)₂SO₄

\tt mol=\dfrac{10.34}{132.14}=0.078

Limitng reactants (ratio mol : coefficient = the smaller)

AlCl₃ : (NH₄)₂SO₄ =

\tt \dfrac{0.097}{2}:\dfrac{0.078}{3}=0.0485:0.026

(NH₄)₂SO₄ ⇒ limiting reactants

So mol Al₂(SO₄)₃ from (NH₄)₂SO₄

\tt \dfrac{1}{3}\times 0.078=0.026

mass Al₂(SO₄)₃

\tt 0.026\times 342.15=8.896

with 54.2% yield, the mass of Al₂(SO₄)₃

\tt 0.542\times 8.896=4.822~g

7 0
3 years ago
According to the law of conservation of energy which is always true
Lerok [7]
The sum of all energies involved in breaking and or forming chemical bonds within the reactants side of the reaction is equal to the sum of all energies involved in the formation and rearranging of atoms within the product side of the chemical reaction.

The total energies of reactants = the total energies of products.
8 0
3 years ago
This is my question for science 9:
kvasek [131]
Yes, she is right. 1: when she took them out of the freezer heat was added. 2: when she toasted them in the oven heat was added and a chemical change occurred because the baking soda/powder reacted, causing the muffins to rise.
5 0
3 years ago
What kinds of minerals do you think are in a cell phone?​
muminat

Answer:

Most likely phosphorus, antimony, arsenic, boron, indium or gallium. The wiring is composed mainly of copper, gold, and silver.

6 0
3 years ago
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