2.

a; MgCO -> MgO + CO BaCO -> BaO + CO

b; 2NaNO -> 2NaNO + O 2KNO

-> 2KNO + O

c; 2Mg(NO ) -> 2MgO + 4NO + O 2Cu(NO )

-> 2CuO + 4NO + O 2Pb(NO ) -> 2PbO + 4NO + O

tick cho mik nha

1.like/you/to/for/house/lunch/my/would/come/to?

=> Would you like to come to my house for lunch?

2.longer/are/elderly/people/are/people/so/there/living/more.

=> People are living longer so there are more elderly people. 3.people/the/baseball/of/all/world/play/round/watch/and/milions.

=> Millions of people play and watch baseball all around the world.

4.next/they/show/around/them/week/Hanoi/Hoa/visit/will/when/her

. => Hoa will show them around Hanoi when they visit her next week.

5.detecive/parents/going/movie/this afternoon/we/see/with/are/a/our /to