D. Circle the correct words. 1. Keith doesn't often wear / isn't often wearing a shirt, but he wears / is
wearing a shirt at the moment.
2. This week, the children stay / are staying with their grandparents because
their parents are in Spain. They visit / are visiting Spain every year.
3. A: What do you do / are you doing in the evenings?
B: I talk /'m talking on the phone with my friends.
4. A: What does Lisa look / is Lisa looking for?
B: Her ball. She plays / is playing football with her friends every
Saturday afternoon.
с английским
10,8 г Х л
2Al + 6HCl = 2ALCl3 + 3H2
n = 2 моль n = 3 моль
Mr = 27 г/моль Vm=22,4 л/моль
m = 54 г V = 67,2 л
10,8 г Al - Х л Н2
54 г Al - 67,2 л Н2
V(H2) = 10,8 * 67,2 / 54 = 13,44 л