Hòa tan hoàn toàn 17,6 gam hỗn hợp Fe, Cu (tỉ lệ mol 2:1) bằng axit H N O 3 , thu được V lít (đktc) hỗn hợp khí X (gồm NO và N O 2 ) và dung dịch Y (chỉ chứa hai muối và axit dư). Tỉ khối của X đối với H 2  bằng 19. Giá trị của V là

A. 8,96

B. 17,92

C. 5,60

D. 4,48

Read the text then answer the questions. (2pts)

Electricity is the most common form of energy today. In the modern world, electricity is very available at the touch of a switch.

Electricity has many uses. The most common use of electricity is providing artificial lighting. In factories, electricity is used to light up the work place. It is also used to operate air conditioners, computers and many other machines. Electricity is also used to power the many appliances that we have in our homes such as appliances include television sets, computers, electric fans, irons and many others. The list is simply endless. Modern man will most probably be lost without electricity.

How would our life be if there were no electricity?

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