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4 years ago

Four acids are analyzed and their Ka values are determined. Which of the following values represents the strongest acid?

Chemistry

2 answers:

amm18124 years ago

6 0

Answer:

D) Ka=1.2•10^-2

Explanation:

#platolivesmatter

labwork [276]4 years ago

4 0

Hi, thank you for posting your question here at Brainly.

The acid dissociation constant, Ka, is an equilibrium constant that measure the strength of an acid. It is a ratio of the concentration of the products (salt and water) and the reactants (acid). The higher the Ka, the more tendency it is to favor the product side, which means more tendency to donate H+ ions. This is exactly the definition of a strong acid (high H+ ionized).

Thus, the answer is letter D.

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3 years ago

Indicate how many significant figures in the following number 1.080

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Answer:

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3 years ago

What is the empirical formula? A compound is used to treat iron deficiency in people. It contains 36.76% iron, 21.11% sulfur, an

Mandarinka [93]

Answer: The empirical formula of the compound is $Fe_1S_1O_4$

Explanation:

Empirical formula is defined formula which is simplest integer ratio of number of atoms of different elements present in the compound.

Percentage of iron in a compound = 36.76 %

Percentage of sulfur in a compound = 21.11 %

Percentage of oxygen in a compound = 42.13 %

Consider in 100 g of the compound:

Mass of iron in 100 g of compound = 36.76 g

Mass of iron in 100 g of compound = 21.11 g

Mass of iron in 100 g of compound = 42.13 g

Now calculate the number of moles each element:

Moles of iron= $\frac{36.76 g}{55.84 g/mol}=0.658 mol$

Moles of sulfur= $\frac{21.11 g}{32.06 g/mol}=0.658 mol$

Moles of oxygen= $\frac{42.13 g}{16 g/mol}=2.633 mol$

Divide the moles of each element by the smallest number of moles to calculated the ratio of the elements to each other

For Iron element = $\frac{0.658 mol}{0.658 mol}=1$

For sulfur element = $\frac{0.658 mol}{0.658 mol}=1$

For oxygen element = $\frac{2.633 mol}{0.658 mol}=4.001\approx 4$

So, the empirical formula of the compound is $Fe_1S_1O_4$

4 0

3 years ago

Read 2 more answers

What is the value for ∆Soreaction for the following reaction, given the standard entropy values?

Vesnalui [34]

The standard entropy for the substances are as follows:

C6H12O2(s) = -212
O2(g) = -205 
CO2(g) = -214 
H2O(l) = -70

We calculate the ∆S°reaction by the expression:

∆S°rxn = ∆S°products - ∆S° reactants
∆S°rxn = (212+6x205)-(6x214+6x70)
∆S°rxn = -262 J/K ------> OPTION 3

6 0

3 years ago

Plz help. Write the chemical name of the following compounds.

TEA [102]

8.Carbonate tetranitride
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3 years ago