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lawyer [7]
3 years ago
10

a poodle and a labrador retriever can mate and have offspring. What is about these dogs that is true? A. They have different sci

entific names. B. They are members of the same species C. They belong to the domain archaea or D. they are in a different genus
Chemistry
1 answer:
mr Goodwill [35]3 years ago
5 0
C. They are members of the same species.
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The ka for hcn is 4.9 ⋅ 10-10. What is the value of kb for cn-?
marusya05 [52]

Answer:

kb = 2,0x10⁻⁵

Explanation:

The ka for HCN is:

HCN ⇄ H⁺ + CN⁻; ka = 4,9x10⁻¹⁰ <em>(1)</em>

The inverse reaction has an equilibrium constant of:

H⁺ + CN⁻ ⇄ HCN k = 1/4,9x10⁻¹⁰ = 2,0x10⁹ <em>(2)</em>

As the equilibrium of the water is:

H₂O ⇄ H⁺ + OH⁻; kw = 1x10⁻¹⁴ <em>(3)</em>

The sum of (2) + (3) gives:

H₂O + CN⁻ ⇄ HCN + OH⁻; kb = kw×k = 1x10⁻¹⁴×2,0x10⁹ =

2,0x10⁻⁶; <em>kb = 2,0x10⁻⁵</em>

<em />

<em>-In fact, the general formula to convert from ka to kb is:</em>

<em>kb = kw / ka-</em>

<em />

I hope it helps!

5 0
3 years ago
If an atom has 2 electrons outside of its nucleus, which combination of protons and neutrons would result in a neutral atom?
Dahasolnce [82]
It would be a llllllllllll
8 0
3 years ago
7) Which element would have the lowest first ionization energy? *<br> Li<br> Be<br> Na<br> Mg
olga_2 [115]

Answer:

Dos quintos al cuadrado dividido cinco medios a la menos 1.

Explanation:

7 0
3 years ago
Read 2 more answers
.92 moles of carbon dioxide, CO2, was produced when you burned C6H120. (glucose) with O2.
Radda [10]

Answer:

16.56g.

Explanation:

You need to compare the number of coefficient of the reaction product to find how much water produced. The reaction formula will produce 6 carbon dioxide(CO2) and 6 water (H2O).

If the reaction produces 0.92 moles of carbon dioxide, then the amount of water produced in moles will be: 0.92 moles * (6/6)= 0.92 moles

The molar mass of water is 18g/mol, so the calculation of moles to mass will be: 0.92 moles * (18g/mol)= 16.56g.

6 0
3 years ago
What in the name of these compounds indicates that these molecules have a double or triple bond?
Papessa [141]
I would like to help but I need to know what compounds you are talking about
5 0
3 years ago
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