Answer:
d
Explanation:
because that in or out I don't know
Answer:
1.) The nitric acid solution will oxidize and thus dissolve _*(Zn and Pb)*_. This will allow to identify _**Pt**_.
2) To distinguish between _*(Zn and Pb)*_, we can use the nickel nitrate.
3) The nickel nitrate solution will oxidize and thus dissolve _**Zn**_ and will not oxidize or dissolve _**Pb**_.
Explanation:
1) Unlike Zinc and Lead, Platinum does not react with Nitric acid. So, it will be the only metal from step 1 that doesn't react. Pt is identified in this manner.
2) Nickel is higher than Lead in the activity series, but Zinc is higher than both of them in the activity series. This selectivity can be used to distinguish between Zinc and Lead metal powders.
3) Because Zinc is higher than Nickel in the activity series, it means that Zinc metal can and will displace Nickel from Nickel Nitrate solution. Therefore the Nickel Nitrate solution will oxidize and dissolve the Zinc metal.
But, there will be no reaction with the Lead metal powders sample as Pb is lower than Ni in the activity series, so, Nickel Nitrate solution will not oxidize or dissolve the Lead metal powders.
Answer:
The answer to your question is: letter A
Explanation:
We can find carbon and hydrogen in the periodic table of the elements then, they are elements. Elements are composed by only one kind of atoms.
We can not find methane in the periodic table so, Methane is a compound. Compounds are composed by 2 or more atoms of the same element or of different elements.
Letter B is incorrect because carbon and hydrogen are elements.
Letter C is incorrect because Methane is a compound and carbon and hydrogen are elements.
Letter D is incorrect because Methane is a compound.
