1;wryte correct sentences in present simple(+)
1 teacher/my/ like/music
2my/play/brothers/basketball
3go/the disco/to.we/saturday/on
4she / study/every/ day
5david /hate/alcohol
6i/drink/sometimes/coffee
7P and H /like/ice/cream
8brother/your/friendly/look
9never/i read/a/book
10my sister/parties/enioy
1 put the verbs into the correct tense (present simple or present continuous
-the train always....(1leave)on time
-what's the matter?why....(2cry/you)?
-that's strange.They....(3not to what )tv
-he....(not to speak)very good english
-please be quiet!....(do)my homework
-where....(live-they)?
-listen! John....music !(phay)
-i never....(go) to the simming pool
-haronr black's a famous pianist.He....(give) to or three concerst every week
-he...(travel)a lot and this week he's in neu york
-he...(stay)at an expensive hotel .He'sathis hotel now
-he ...(have) his breakfast in the dining -room.He....(drink) a cup of coffee and he...(read) a newspaper.Harold's always very busy.He ...(play)the piano regularly.He...(practise)for four hours every day.He ...(go) to bed late and he always...(get up)early.but the sometimes....(get)dressed too quickly,and this morning he ... (wear)one blue sock
Giúp em với
1:viết công thức hoá học của các axit tuơng ứng CO2,SO2,SO3,N2O5
2 :K2O,NO,CO2, N2O5 CO,SO2 P2O5, CaO, Fe2O3,CuO, SiO2, Al2O3,FeO, ZnO
+oxit tac dụng với nuớc
+t/d axit clohiđric
+t/d dung dịch kalihiđroxit
Viết pthh xảy ra
3:Viết pthh lưu huỳnh đioxit với
-magie oxit
-Kalihiđroxit
-Canxi hiđroxit
4: X+H2O =H2SO4
Y+H2O =H3PO4
Z+HCl=CuCl2 +H2O
H2+T=Cu +H2O
Giúp em với mọi nguời ơi
1 Cu->CuO->CuCl2->CU(OH)2->CuO->Cu
cacbon->cacbon(2)oxit->canxi cacbonat->canxi oxit->can xihidroxit
2 cho các chất sau Na2O,CO2,H2O,H2SO4,CaO cặp chất nào tác dụng với nhau thành 1đôi, viết các pthh
3 cho cac chất Na2O,CO2,H2O,H2SO4, CuO viết pthh điều chế
a. Naoh
b.Cu(OH)2