Answer:
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In order to determine the amount of moles in 23g of phosphorus, you must use math.
To get the answer, you must multiply the molar mass of phosphorus, which there is 30.97g in 1 mol, and put the mol over the mass, then multiply by your desired amount you want, which is 23g; it would look like this:
(23.00g)( <u>1 mol </u> = x
30.97g )
Then you plug the answers into a calculator and you should get the answer of 0.74265.
Answer:
Na₃N
Explanation:
The compound made by sodium and nitrogen is called sodium nitride.
The oxidation state of sodium is +1 it loses its one valance electron and get complete octet while nitrogen have five valance electrons it require three more electron to gain stability.
When it react with sodium it needed three electron that's why three sodium atom are react with one nitrogen atom to make the compound overall neutral.
Na⁺ N³⁻
Na₃⁺³N³⁻
Chemical equation:
6Na + N₂ → 2Na₃N
however this compound us unstable and decompose to gives nitrogen and sodium.
Chemical equation:
2Na₃N → 6Na + N₂
Answer:
1.878g
Explanation:
Volume = 30.0ml
Density = 0.626gcm−3
Mass = ?
Be careful in this kind of questions to check for the units. In this case one has to remember 1 mL equal 1 cm³ so density = 0.626g/ml
The relationship between all three parameters is given by the equationn below;
Mass = Density * Volume
Mass = 0.626g/ml * 30 = 1.878g
Answer:
Physical changes.
Explanation:
Any physical changes can be related to boiling. Freezing water, tearing paper, anything physical that changes and objects apperance is a physical change.