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Alborosie
3 years ago
10

Magnesium has three naturally occurring isotopes. 24Mg (isotopic mass 23.9850 arnu. abundance 78.99%). 25Mg Osotypic mass 24.985

8 amu, abundance 10.00%), and 26Mg Osotopic mass 25.9826 amu, abundance 11.01%). Calculate the atomic mass of magnesium.
Chemistry
1 answer:
ehidna [41]3 years ago
3 0

Answer:

24.3049 amu

Explanation:

Atomic mass of magnesium = percentage average of its isotopes

= 23.9850 x .7899 + 24.9858 x 0.10 + 25.9826 x .1101

= 24.3049 amu

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Which statement describes a strong acid?
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Care to help me guys please​
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Answer:

A. Na₂SO₄ and HCl

C. Polar solutes are soluble in polar solvents but are insoluble in non-polar solvents Non-polar solutes are insoluble in polar solvents but are are soluble in non-polar solvents

Ionic solutes are soluble in polar solvents but are insoluble in non-polar solvents.

Like dissolves like simply means that molecules of substances having similar chemical properties dissolve in each other

Explanation:

A. Ionic substances like Na₂SO₄ are composed of charged particles called ions. These ions are either positively charged or negatively charged, therefore, they are attracted to substances of opposite charges. Also, polar molecules like HCl contains two oppositely charged ends. A polar solvent consists of molecules with two oppositely charged ends, therefore, ionic substances as well polar substances dissolve in them according to the concept of like dissolves like.

Gasoline being non-polar will only dissolve in like substances, polar solvents.

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Ionic solutes are soluble in polar solvents but are insoluble in non-polar solvents.

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_Li + __F2 → _LIF<br> How do I balance this?
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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:

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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

 

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According to the ph scale, what is the approximate ph of ammonia solution?
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I believe that the answer is 11.5
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