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BARSIC [14]
3 years ago
15

Advantages of modern periodic table​

Chemistry
1 answer:
spayn [35]3 years ago
8 0

Answer:

It organizes all of the elements and it allows you to easily find the groups of elements such as

Group 1 of the periodic table consists of hydrogen and the alkali metals

Group 2 consists of the alkaline metals (batteries!)

Groups 3–12 contain transition metals

Groups 13–16 each contain at least one metalloid

Group 17 contains halogens

Group 18 consists of noble gases which are stable.

It is easy to read and theres a song to help you memorize them online.

Explanation:

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The equilibrium constant, Kc, for the following reaction is 0.967 at 650 K. 2NH3(g) N2(g) 3H2(g) When a sufficiently large sampl
AlekseyPX

Answer: Concentration of NH_3 in the equilibrium mixture is 0.31 M

Explanation:

Equilibrium concentration of H_2 = 0.729 M

The given balanced equilibrium reaction is,

                 2NH_3(g)\rightleftharpoons N_2(g)+3H_2(g)

Initial conc.            x                0           0

At eqm. conc.     (x-2y) M     (y) M   (3y) M

The expression for equilibrium constant for this reaction will be:

3y = 0.729 M

y = 0.243 M

K_c=\frac{[y]\times [3y]^3}{[x-2y]^2}

Now put all the given values in this expression, we get :

K_c=\frac{0.243\times (0.729)^3}{(x-2\times 0.243)^2}

0.967=\frac{0.243\times (0.729)^3}{(x-2\times 0.243)^2}

x=0.80

concentration of NH_3 in the equilibrium mixture = 0.80-2\times 0.243=0.31

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