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attashe74 [19]
3 years ago
5

Rank the following 0.100 M solutions in order of increasing H3O+ concentration:

Chemistry
1 answer:
Inessa05 [86]3 years ago
5 0

Answer:

HCN < HOCl < HF  

Explanation:

The larger the Kₐ value, the stronger the acid.

6.2 × 10⁻¹⁰ < 4.0 × 10⁻⁸ < 6.3 × 10⁻⁴

   HCN      <     HOCl    <      HF

 weakest       stronger    strongest

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A student must prepare 7.00 L of 0.100 M Na2CO3 (106 g/mol). Which is the best procedure for preparing this solution
Zielflug [23.3K]

Answer:

Measure 74.2 g Na2CO3 and add H20 until the final homogeneous solution has a volume of 7.00 L

Explanation:

The best procedure is

Mole of

Na_2CO_3 = Volume \times molarity\\\\= 7.00 L \times 0.100 mol\\\\

= 0.700 mol

The mass of

Na_2Co_3 = Moles \times molar\ mass \\\\= 0.700 mol \times 106 g/mol

= 74.2 g

So as per the above calculation, the option 3 is correct as the solution volume is 7.00 L so the same is to be considered

hence, all other options are wrong

7 0
3 years ago
How many double bonds are in lewis structure of oxygen difluoride, OF2? 1,0, 2, or 3​
solmaris [256]

Answer:

0

Explanation:

An image of the lewis structure of the compound OF2 is shown in the image attached.

A Lewis structure is a structure in which electron pairs on atoms are shown as dots. Sometimes shared electron pairs are shown by a horizontal straight line connecting the two atoms involved.

OF2 has no double bonds as shown in its structure. It is a compound containing only two O-F sigma bonds and no pi-bonds.

5 0
3 years ago
What type of reaction is represented by the following? A + B ⟶ AB
Elden [556K]

Answer:

Synthesis Reaction

Explanation:

It is a synthesis Reaction because it is taking little reactants and forming a big product!

6 0
2 years ago
If an insect population increases and then decreases as the available supply of food changes, what does this demonstrate
Semenov [28]
D.

This is self-regulation because when the population of the insects becomes too large, it regulates itself and starts to decrease due to a shortage of resources.
7 0
3 years ago
Determine the rate of a reaction that follows the rate law:
natima [27]

Answer:

k= 1.5

[A] = 1 M

[B] = 3 M

m = 2

n = 1

Explanation:

rate = k[A]”[B]"

6 0
2 years ago
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