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Fittoniya [83]
3 years ago
9

13. How many protons are present in total in a carbon atom?

Chemistry
1 answer:
frutty [35]3 years ago
3 0

Answer:

The answer to your question is below

13.- b

Explanation:

13. How many protons are present in total in a carbon atom?

(a) There are always twelve.  No, atomic mass of Carbon is 12 but the number of protons is half the atomic mass (6).

(b) There are always six.  The answer is correct. Carbon's atomic number is 6, that means that it has 6 protons.

(c) It depends on the isotope.  It's wrong, depends on the isotope the number of neutrons but not the number of protons.

(d) There are always four.  No, 4 is the number of protons of Beryllium.

14. Of the following, which molecule is most polar? (The electronegativities of the atoms are as follows: chlorine 3.0, boron 2.0, hydrogen 2.1, oxygen 3.5, carbon 2.5, and bromine 2.8.)

Oxygen, because of these elements is the one with the highest electronegativity.

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3 years ago
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Why did scientists need to establish an international language for elements
Liono4ka [1.6K]
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8 0
3 years ago
Tin metal reacts with hydrogen fluoride to produce tin (ll )fluoride and hydrogen gas according to the balanced equation. Sn(s)+
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Answer:

                      1.263 moles of HF

Explanation:

                     The balance chemical equation for given single replacement reaction is;

                                    Sn + 2 HF → SnF₂ + H₂

Step 1: <u>Calculate Moles of Tin as;</u>

As we know,

                    Moles  =  Mass / A.Mass    ----- (1)

Where;

           Mass of Tin  =  75.0 g

           A.Mass of Tin  =  118.71 g/mol

Putting values in eq. 1;

                    Moles  =  75.0 g / 118.71 g/mol

                    Moles  =  0.6318 moles of Sn

Step 2: <u>Find out moles of Hydrogen Fluoride as;</u>

According to balance chemical equation,

                     1 mole of Sn reacted with  =  2 moles of HF

So,

              0.6318 moles of Sn will react with  =  X moles of HF

Solving for X,

                     X =  0.6318 mol × 2 mol / 1 mol

                     X  =  1.263 moles of HF

8 0
2 years ago
Write the structures for all the isomers of the –C5H11 alkyl group.
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Answer:

Explanation:

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