Answer: The sample of ammonium carbonate contains
0.560 mol NH
4
Explanation:The chemical formula for ammonium carbonate is
(
NH
4
)
2
CO
3
. The formula indicates that in one mole of ammonium carbonate, there are two moles of ammonium ions,
NH
4
Answer:
Decreases
Explanation:
An element's oxidation number decreases because it gained electrons.
Answer: A) a chemical change is required to seperate the elemnts present in it
Explanation:
Water is a compound, since it is the result of combining atoms: hydrogen and oxigen . In fact, the chemical formula of water is .
On the other hand, chemically in a compound the atoms must be combined in a fixed ratio by mass. In the case of the water molecule, the ratio is 2:1 (For each oxigen atom there are two hydrogen atoms).
So, if we want to separate the atoms that make up the water molecule, it only will be possible by a chemical change and not by a physical one.
Hence the correct option is A.
Answer:
The temperature differs in 25 degrees on the Celsius scale
Explanation:
The relationship between temperatures on the two scales is:
So, if the temperature recorded differed by 45, then the degrees on the Celsius scale can be calculated as follows:
<u>Since F₂ - F₁ = 45, we have:</u>
Therefore, the temperature extremes differ in 25 degrees on the Celsius scale.
I hope it helps you!