Đáp án: cho 6,5 gam Zn hòa tan hoàn toàn trong 500ml dd HCl Tính thể tích H2 thoát ra ở dktc va` nồng độ mol dung dịch HCl - Đáp án V_(H_(2) ) = 2,24(l) CM_(HCl) =0,2(M) Giải thích các bước giải n_(Zn) = 6,5 65=0,1(mol) Zn + 2HCl → ZnCl_(2) + H_(2) mol 0,1 → 0,2 → 0,1 V_(H_(2) ) = 0,122,4=2,24(l) CM_(HCl) = 0,1(5001000)=0,2(M)

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2 năm trước

cho 6,5 gam Zn hòa tan hoàn toàn trong 500ml dd HCl. Tính thể tích H2 thoát ra ở dktc va` nồng độ mol dung dịch HCl

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haiyen1205

2 năm trước

Đáp án:

$V_{H_{2} }$ = 2,24(l)

$CM_{HCl}$ =0,2(M)

Giải thích các bước giải:

$n_{Zn}$ = 6,5 : 65=0,1(mol)

Zn + 2HCl → $ZnCl_{2}$ + $H_{2}$

mol 0,1 → 0,2 → 0,1

$V_{H_{2} }$ = 0,1.22,4=2,24(l)

$CM_{HCl}$ = 0,1:(500:1000)=0,2(M)

Trần Ngân

2 năm trước

Đáp án: 500ml= 0.5 l

Zn + 2HCl-ZnCl2 + H2

0.1 0.2 0.1 (mol)

n Zn=m/M= 6.5/65= 0.1(mol)

V H2= n. 22.4= 0.1 . 22.4= 2.24 (lít)

CM HCl= n/ Vdd= 0.2/ 0.5=0.4 M

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cho 6,5 gam Zn hòa tan hoàn toàn trong 500ml dd HCl. Tính thể tích H2 thoát ra ở dktc va` nồng độ mol dung dịch HCl

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Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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cho 6,5 gam Zn hòa tan hoàn toàn trong 500ml dd HCl. Tính thể tích H2 thoát ra ở dktc va` nồng độ mol dung dịch HCl

2 câu trả lời

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Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.