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lorasvet [3.4K]
3 years ago
9

okay another question from my test I’m almost done sorry for spamming I just gave up on that class because I’m pretty sure it ca

n’t get worst :D

Chemistry
1 answer:
Luda [366]3 years ago
6 0

Answer:

The Answer is C.

Explanation:

The Mass number is the total number of nuetrons and protons in the nuclues. So there are 84 particles in the nuclues because the mass number is 84. Also because the atomic number is 36 that means that there are 36 protons. It also happens to mean that there are 36 electrons because the amount of the protons is equal to electrons unless stated otherwise. Because electrons reside outside of the nuclues there are 36 particles outside the nueclues.

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_Li + __F2 → _LIF<br> How do I balance this?
Semmy [17]

Answer:

 2Li   +   F₂    →    2LiF

Explanation:

The reaction expression is given as:

          Li   +   F₂    →     LiF

We are to balance the expression. In that case, the number of atoms on both sides of the expression must be the same.

 Let use a mathematical approach to solve this problem;

  Assign variables a,b and c as the coefficients that will balance the expression:

             aLi   +  bF₂    →     cLiF

Conserving Li: a  = c

                   F:  2b  = c

          let a = 1, c  = 1 and b  = \frac{1}{2}  

  Multiply through by 2;

        a  = 2, b = 1 and c  = 2

               2Li   +   F₂    →    2LiF

 

5 0
3 years ago
Where are the most reactive nonmetal elements found on the periodic table?
Varvara68 [4.7K]

Answer is: group 17 on the periodic table.

Group 17 (halogens) elements are: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I).

They are very reactive and easily form many compounds.  

Fluorine and chlorine are in gaseous state, bromine is liquid and iodine is in solid state in room temperature.

Halogens need to gain one electron to have electron cofiguration like next to it noble gas.

For example, fluorine has 9 electrons and it gain easily one electron in chemical reaction to have electron configuration like noble gas neon (Ne) with 10 electrons.  

6 0
3 years ago
Read 2 more answers
What effect does an increase in products have on the reaction rate of a mixture at equilibrium? A. The forward reaction rate inc
Anna007 [38]

<u>Answer:</u>

<em>D. The reverse reaction rate increases.</em>

<u>Explanation:</u>

The<em> rate of reverse</em> increases if the products are increased in a mixture at equilibrium.

At first,<em> rate of forward and backward</em> reactions are same for a <em>mixture in equilibrium. </em>

<em>If we add products or,the reaction moves to the opposite side I.e towards reactants side.</em>

so,according to the Le Chateliers principle,the reaction shifts opposite to the side of increase. so,according to the Le Chateliers priciple, <em>the rate of reverse or backward reaction will increase with the increase in the products.</em>

4 0
3 years ago
What ecosystems would be likely to have the greatest diversity
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3 years ago
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Kitty [74]
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k(NaI)=2
4 0
3 years ago
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