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Oksana_A [137]
3 years ago
11

Calculate the mass of 1.25 moles of Al2(SO4)3

Chemistry
2 answers:
goblinko [34]3 years ago
7 0
If we convert 1.25 into grams and round it up the answer will be 427.7
k0ka [10]3 years ago
6 0
Total molar mass of Al2(SO4)3:

2(27)+3(32.1)+12(16) = 342.3

the mass of Al2(SO4)3:
number of moles times molar mass
= 1.25 times 342.3
= 427.875 kg



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For the zero-order reactions, concentration-time equation can be written as follows:

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where:

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<u>To solve the problem, we just replace our data in the concentration-time equation, and we clear the value of t.</u>

Data:

K = 4.2 ×10−3atm/s,  

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<em>We clear the incognita :</em>

[A] = - Kt + [Ao]............. Kt =  [Ao] - [A]

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<em>We replace the numerical values:</em>

t = (2 atm - 0 atm)/4.2 ×10−3atm/s = 476,19 s = 7,94 minutes

So, we need 7,94 minutes to achieve complete conversion into elements ([HBr]=0).

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Answer:

The solution to this question can be defined as follows:

Explanation:

Please find the attached file for the solution:

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