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3 years ago

PLEASE HELP ME! What are some patterns or trends that are present in the table of elements?

Chemistry

1 answer:

Sati [7]3 years ago

5 0

Some patterns and trend that are present in the periodic table would be

1. electronegativity (from left-to-right it increases across the table)

2. ionization (from left-to right it increases and from bottom-to-top it increases)

3. electron affinity (same as ionization energy)

4. atom radius (increases opposite way; from right-to-left it increases and from top-to-bottom it increases)

5. melting point (higher melting points with metals and lower melting point with non-metals)

6. metallic character (same as atom radius)

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A reaction produces 0.415 mol of H2O. How many molecules of water are produced?

user100 [1]

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4 years ago

What is the atomic number of this atom?a,b,c,8,13,9,5,4

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Answer:

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3 years ago

Consider the equilibrium reaction: 3CIO-(aq) ↔ CIO3-(aq) + 2CI-(aq) The equilibrium constant Kc = 3.2 x 103. The following conce

blagie [28]

Answer:

Forward direction

Explanation:

The reaction quotient of an equilibrium reaction measures relative amounts of the products and the reactants present during the course of the reaction at particular point in the time.

Q < Kc , reaction will proceed in forward direction.

Q > Kc , reaction will proceed in backward direction.

Q = Kc , reaction at equilibrium.

It is the ratio of the concentration of the products and the reactants each raised to their stoichiometric coefficients. The concentration of the liquid and the gaseous species does not change and thus is not written in the expression.

Thus, for the reaction:

$3CIO^{-}_{(aq)}\rightleftharpoons CIO_3^{-}_{(aq)}+2Cl^{-}$

The expression is:

$Q=\frac {[CIO_3^{-}][Cl^{-}]^2}{[CIO^{-}]^3}$

Given,

[Cl⁻] = 0.50 mol/L; [ClO₃⁻] = 0.32 mol/L; [ClO⁻] = 0.24 mol/L

So,

$Q=\frac{0.32\times (0.50)^2}{(0.24)^3}$

Q = 5.7870

Since, Q < Kc ( $3.2\times 10^3$ )

The reaction will go in forward direction.

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