Hòa tan hết 12 gam Mg vào X gam dung dịch H2SO4 9,8 % . Giá trị của X là : Mg = 24 , O =16 , H =1 , S =32 giai chi tiet ho minh va nha minh cam on

1 câu trả lời

$Mg+H_2SO_4\to MgSO_4+H_2$

$n_{Mg}=\dfrac{12}{24}=0,5(mol)$

Theo PTHH: $n_{Mg}=n_{H_2SO_4}$

$→n_{H_2SO_4}=0,5(mol)\\→m_{H_2SO_4}=0,5.98=49g\\m_{dd\,H_2SO_4}=\dfrac{49}{9,8\%}=500g\\→X=500g$

Vậy $X=500g$

Câu hỏi trong lớp Xem thêm

Combine the two sentences into one. Using where, when. …………………………………………………………………………………… 2. I’ll never forget the day. I met you on that day. …………………………………………………………………………………… 3. The city was beautiful. We spent our vacation in that city. …………………………………………………………………………………… 4. Monday is the day. We will come on that day. …………………………………………………………………………………… 5. That is the restaurant. I will meet you at that restaurant. …………………………………………………………………………………… 6. 7:05 is the time. My plane arrives at that time. …………………………………………………………………………………… 7. The town is small. I grew up in that town. …………………………………………………………………………………… 8. That is the drawer. I keep my jewelry in that drawer. …………………………………………………………………………………… 9. 1960 is the year. The revolution took place in that year. …………………………………………………………………………………… 10. July is the month. The weather is usually hot in that month. ……………………………………………………………………………………

6 lượt xem
1 đáp án
12 giờ trước