[hannah93]

Q1.What is the room temperature ofchlorine,bromine and iodine?
Q2.Which metal's salts give a blue-green flame test and blue precipate with sodium hydrogen?
Q3.Hydrogen chloride gas is very soluble in water and denser than air.How should you collect a sample?
Q4.Is the mass of a rusty nail higher or lower than the original nail?Explain your answer.
Q5.Which element is heated with iron oxide to produce iron metal?

THANKS...

[hannah93]

Which solube salt is formed when copper oxide reacts with dilute suphuric acid?

[Unknown008]

For 1.

What a question! The room temperature of chlorine, bromine and iodine are all at room temperature. Well, I guess you meant the physical states of these substances at room temperature. Well, in the periodic table, you'll notice that elements generally become 'more solid' down groups.

And if you didn't know, chlorine is a gas, bromine a liquid, and iodine a solid.

For 2.

What do you think the metal is? Obviously, is is a transition element since it gives coloured compounds in sodium hydroxide ( I don't think it is sodium hydrogen)

For 3.

Do you know how to collect gases?

There is;
1. By bubbling the gas through water, water displacement.
2. By upward delivery, or downward displacement of air.
3. By downward delivery, or upward displacement of air.

Now choose, and post back.

For 4.

What is rust? If you can answer this, you'll be able to answer your question. Again, post back to confirm.

For 5.

That, you need a metal which is higher than iron in the reactivity series. Careful, a too reactive one is dangerous. As a hint, this process is used to remove the oxide from railings (train railings)

And your last one;

Write at least an equation. If you don't know, you must know that any metal oxide when reacted with an acid will give a salt (derived from the acid) and water.

Post back your answers, please.