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defon
3 years ago
11

2.50 g of Zn is added to 5.00 g of HCl

Chemistry
1 answer:
Debora [2.8K]3 years ago
5 0
Zn+2HCl ----> 2ZnCl2 + H2

For 2.50 g of Zn

Mass per mol = 2.50/molar mass of Zn = 2.50/65.38 = 0.0382 g/mol
There are two moles of ZnCl2 and total mass = 2*0.0382*molar mass of ZnCl2 = 2*0.0382*136.286 = 10.42 g

For 2 g of HCl

Mass per mol = 2/2*molar mass of HCl = 2/ (2*36.46) = 0.0274 g/mol
For the two moles of ZnCl2, mass produced = 2*0.0274*136.286 = 7.48 g

It can be noted that 2 g of HCl produced less amount of ZnCl and thus it is the limiting reagent.
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<u>Describe both water and other substances</u>

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<u>This statement is :False for both water and other substances</u>

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It describe other substance

<u>This statement is :False for water but true for other substances.</u>

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It describes water:

<u>This statement is :True for water because solid ice is less dense than liquid water.</u>

<u>False for other substance, they have positive slope</u>

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<u>Answers to statement 1 , 2,5 and 8</u>

<u>Answers to statement 1 , 2</u>

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In Both for water and other substance

<u>High pressure will cause the liquid to become solid.</u>

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2.The Particles of solid are closely packed hence there is maximum force of attraction between the particle of solid as compared to liquid and gases .

Hence , The molecules <u>of both water and other substance</u>s are closest in the solid phase

This also means that in liquid molecules are far apart .

Rest statement : 3, 4 ,6 ,7 are explained below(see attached image)

<u>The molecules are closest in the liquid phase is false statement  and does not describe both water and other substance</u>

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The line DB is  = the solid-liquid coexistence line

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4. the solid-liquid coexistence line has a negative slope.

6.The solid is less dense than the liquid.

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Explanation:

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