Cho 32,5 g kẽm tác dụng với 36,5 g axit clohidric [HCL]thì thu được 68 g kẽm clorua [ZnCl2] và khí hidro [H2].
a/ Viết phương trình chữ của phản ứng và lập công thức về khối lượng của phản ứng xảy ra.
b/ Tính khối lượng khí hidro thu được.
c/ Chobieets có bao nhiêu phân tử H2 trong khối lượng khí hidro thu được?
Điền những từ : a few, a little, any, how many, how much, many, much, some vào chỗ ba chấm :
I really enjoyed this game. The arm is to build a city, but there are a lot of problems to solve along the way.
( 1) ... houses , hotels, roads and factories can you build ? ( 2 ) ...money and energy do you needs to build them ? players use money called '' megabucks ''. You start with just ( 3 ) ... megabucks, so you much spend them carefully. It's difficult to build a city on your own, so ( 4 ) ... players work together. For example, if you have oly got ( 5 ) ... energy, you can borrow or buy ( 6 ) ... electricity from a neighbour. But selfish and greedy players don't make ( 7 ) ... friends. If they haven't got ( 8 ) ... money or energy, no one helps them and they can't finish their city. So it's best to be friendly to the other players !