『急』帮我解答chemistry

hochin

1.a gaseous hydride of hydrogen, X contains 12.5% hydrogen by mass. when 1 mole of X is heated strongly, it dissociate into 3 mole of the gaseous element. the formula of X is.......

2.0.52g of metal Y reduces an aques X2+ solution to produce 0.96g metal X and itself is oxidised to Y3+. what is the relatine atomic mass of Y (X,64)

3. NCl3 consists of 3 isotopes 14N, 35Cl and 37Cl. how many lines are found in mass spectrum of NCl3 which correspond to molecular and fragmented molecular ions excluding atomic ions? reason???

4.when 30cc of an hydride of element X was heated,gaseous X and 60 cc of hydrogen formed. how many hydrogen atoms are there in amolecules of the hydride.

5. combustion of 20cc of a gas containing elements nitrogen and hydrogen in excess oxygen produces 10cc of nitrogen gas and 30cc of water vapour. what is the formula of the gas

6.explain how hydrogen donding affects the boiling pt of water?

idontwant2b

1. NH2 是吗？
2. 54
3.
4. 4
5. NH3
6. with intramolecular h-bonding, boiling point is lower as it reduces van de waals force. less heat is needed to break the intermolecular bond.
with intermolecular h-bonding, boiling point is higher. each molecule is held by van de waal and additional h-bond, so more heat is needed to break the bond.
with both h-bonding, intermolecular h-bonding is more significant.

hochin

可以写step吗？

秋分

回复 2# idontwant2b


    1.gaseous hydride

oceanheng

我也想知道STEP耶..
谁能解答吗?