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uranmaximum [27]
1 year ago
14

Give the name and symbol or formula of a Group 7A(17) element or compound that fits each description or use:(c) Weakest hydrohal

ic acid
Chemistry
1 answer:
olga2289 [7]1 year ago
8 0

Hydrofluoric acid (HF) is a Group 7A(17) element or compound that fits each description or use:(c) Weakest hydrohalic acid.

When hydrohalic acids dissolve in water to produce acids, they are frequently referred to as hydrogen halides. They have the formula HX, where X can be any of the halogens. They are diatomic organic compounds. Iodine, chlorine, bromine, and fluorine are a few of the halogens.

Given that fluorine is the most electronegative of the four halides and iodine the least, it seems contradictory that the acidity of the series of hydrohalic acids, HF, HCl, HBr, and HI, increases from HF through HI.

The acid hydrofluoric acid (HF) is the weakest hydrohalic acid. Its status as a weak acid is primarily due to the fact that it does not entirely dissociate in water. In essence, it defies the description of a strong acid. On the other hand, after dissociation, the ions it creates are firmly bonded to one another.

To know more about hydrohalic acid refer to:  brainly.com/question/12210499

#SPJ4

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Which of these are ionic compounds? Check all that apply.
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I think the correct answers from the choices listed above are the first, third and the last option. Ionic compounds are compounds that dissociates into ions when in aqueous solution. From the list, NH4Cl, KF and MgO are the ionic compounds. Hope this answers the question.
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How many liters of a 0.30M solution are needed to give 2.7 moles of solute? Your answer:
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How to describe a ufo??​
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2 years ago
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For a school event 1/6 of the athletic field is reversed for the fifth -grade classes the reserved part of the field is divided
SVETLANKA909090 [29]

Answer:

\frac{1}{24}

Explanation:

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For a school event, 1/6 of the athletic field is reserved for the fifth -grade classes and the reserved part of the field is divided equally among the 4 fifth grade classes in the school.

To find: fraction of the whole athletic field reserved for each fifth class

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3 0
3 years ago
A 35.40 gram hydrate of sodium carbonate, Na2CO3•nH2O, is heated to a constant mass. Its final weight is 30.2 g. What is formula
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Answer:

Na₂CO₃•H₂O

Explanation:

After it is heated, the remaining mass is the mass of sodium carbonate.

30.2 g Na₂CO₃

Mass is conserved, so the difference is the mass of the water:

35.4 g − 30.2 g = 5.2 g H₂O

Convert masses to moles:

30.2 g Na₂CO₃ × (1 mol Na₂CO₃ / 106 g Na₂CO₃) = 0.285 mol Na₂CO₃

5.2 g H₂O × (1 mol H₂O / 18.0 g H₂O) = 0.289 mol H₂O

Normalize by dividing by the smallest:

0.285 / 0.285 = 1.00 mol Na₂CO₃

0.289 / 0.285 = 1.01 mol H₂O

The ratio is approximately 1:1.  So the formula of the hydrate is Na₂CO₃•H₂O.

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