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Amiraneli [1.4K]
3 years ago
13

18. When a chemical reaction takes place in an open system, matter_____.

Chemistry
2 answers:
nlexa [21]3 years ago
8 0

Answer:

can enter from or escape to the surroundings

Explanation:

i tried it and it worked

zheka24 [161]3 years ago
4 0
A) can enter from the surroundings, but cannot escape to the surroundings
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Because water molecules are polar and carbon dioxide molecules are nonpolar,
Gala2k [10]

The correct is D.

Water is a polar molecule and it has polar bonds, which carry partially positive and partially negative charges. This polar bond increases the attraction between molecules of water and thus it requires a greater energy to break the bond between the molecules of water compare to carbon dioxide, which is a non polar molecule. Thus, water has a higher boiling point than carbon dioxide.

4 0
3 years ago
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What is the number assigned to an element on the Periodic Table?
spayn [35]

Answer:

Element Atomic Number One number you will find on all periodic tables is the atomic number for each element.

Explanation:

<em>hope it helps :))</em>

6 0
3 years ago
MgS is the chemical formula for the ionic compound named
irina1246 [14]

Answer:

Magnesium Chloride

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3 0
2 years ago
The ka of acetic acid ch3co2h is 1.8 x10-5. what is the ph
AysviL [449]
You must know the concentration of the acetic acid. Suppose the concentration is 0.1 M. The solution is as follows:

            CH₃COOH → CH₃COO⁻ + H⁺
 I                  0.1               0              0
C                 -x                +x            +x
E              0.1 - x             x               x

Ka = (x)(x)/(0.1 - x)
1.8×10⁻⁵ = x²/(0.1 - x)
Solving for x,
x = 1.333×10⁻³ = H⁺

pH = -log[H⁺] = -log(1.333×10⁻³)
pH = 2.88

6 0
3 years ago
A 20 ml sample of .875 m hcl solution was diluted t o150 ml. calculate the molarity of the resulting solution
Veronika [31]
0.11666667 because M1V1=M2V2
4 0
3 years ago
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