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Lemur [1.5K]
3 years ago
12

What are the examples of all the non metals in the first twenty element​

Chemistry
1 answer:
agasfer [191]3 years ago
5 0

Answer:

semimetals or metalloids.

Explanation:

You might be interested in
Consider two compounds. Compound A contains 15.7 g of sulfur and 18.6 g of fluorine. Compound B contains 25.4 g of sulfur and 60
Lunna [17]

Answer:

No, compound A and B are not the same compound

Explanation:

According to the law of definite proportion "every chemical compound contains fixed and constant proportions (by mass) of its constituent elements." (Encyclopedia Britannica)

We can see in the question that the ratio of flourine to sulphur in compound A is 1.18 while the ratio of flourine to sulphur in compound B is 2.37.

The two chemical compounds do not contain a fixed proportion by mass of their constituent elements therefore, they can not be same compound according to the law of definite proportions.

4 0
3 years ago
Please help me!!!!!!
Natalka [10]
I think it should be 2.358
7 0
3 years ago
1)
nataly862011 [7]

Answer:

A

Explanation:

a is the right answer abi

5 0
3 years ago
What is the freezing point of a solution containing 4.78 grams naphthalene (molar mass = 128.2 g/mol) dissolved in 32.0 grams pa
tester [92]
This is a freezing point depression problem, so it will use the equation:

ΔT = i Kf<span> m
</span>
i = 1 (naphthalene does not dissociate further when dissolved)
Kf = 7.10 C/m (a constant for paradichlorobenzene, which you'd be given)
m = moles of solute / kg of solvent; moles of solute = 4.78 / 128.2 = 0.0373; kg of solvent = 0.032; m = 0.0373 / 0.032 = <span>1.166m

</span>ΔT = 1 x 7.10 x 1.166 = 8.279 C

This means the normal freezing point of pure paradichlorobenzene is decreased by 8.279 C; the normal freezing point (again, something you'd be given) is 53.5 C, so the new freezing point would be 53.5 - 8.279 = 45.221 C.
4 0
3 years ago
Help me please I really need help and answer only if u know the answer
Ahat [919]

Answer:

They have similar DNA

Explanation:

DNA is what makes a reasons appearance

4 0
3 years ago
Read 2 more answers
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