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2 years ago

What is the mass of 0.251 moles of water? Using dimensional analysis show work

Chemistry

1 answer:

AVprozaik [17]2 years ago

3 0

$1 \text{ mol of H}_2 \text{O} \equiv 18 \text{ g} \implies 0.251 \text{ moles of H}_2 \text{O} \equiv 4.518 \text{ g}$

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Burka [1]

Answer:

[OH-] = 1.0 x 10-10 M

Explanation:

The acidity of a solution can be determined directly from the concentration of the hydrogen ions and indirectly from the concentrations of the hydroxide ions.

Generally, for a neutral solution we have;

[H3O+] = [OH-] = 1.0 x 10-7 M

For an acidic solution;

[H3O+] > 1.0 x 10-7 M

[OH-] < 1.0 x 10-7 M

Comparing the options the correct option is;

[OH-] = 1.0 x 10-10 M

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2 years ago

Which of the following is generally true of female bones in relationship to male bones?

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MAVERICK [17]

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Explanation:

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_{c}$

For a general chemical reaction:

$aA+bB\rightleftharpoons cC+dD$

The expression for $K_{eq}$ is written as:

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The concentration of pure solids and pure liquids are taken as 1 in the expression.

For the given chemical reaction:

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The expression of $K_c$ for above equation is:

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We are given:

$[H_2S]_{eq}=0.671M$

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Putting values in above expression, we get:

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3 years ago

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valina [46]

Answer: The correct option is d) 460 kJ

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2 years ago

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