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ELEN [110]
3 years ago
10

Perfume evaporating is it a chemical change or physical change

Chemistry
2 answers:
Vsevolod [243]3 years ago
7 0
This is a physical change: a change of state: from liquid to gas. 

This is not a chemical change, as no chemical reaction takes place: the substance is the same, but it changes the state at which it is in: there is no reaction with other chemical substances. 
uysha [10]3 years ago
7 0
Physical Change. It's a liquid to a gas
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3 years ago
Why is the answer C for this problem?
pshichka [43]

Answer:

\boxed{\text{(C) X}$_{3}$P$_{2}}

Explanation:

Step 1. Identify the Group that contains X

We look at the consecutive ionization energies and hunt for a big jump between them

\begin{array}{crc}n & IE_{n} & IE_{n} - IE_{n-1}\\1 & 730 & \\2 & 1450 & 720\\3 & 7700 & 6250\\4 & 10500 & 2800\\\end{array}

We see a big jump between n = 2 and n = 3. This indicates that X has two valence electrons.

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We must have 3 X atoms for every 2 P atoms.

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4 0
3 years ago
What is the name of the scientist who discovered that atoms have positive charges
sukhopar [10]
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