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xxMikexx [17]
3 years ago
13

URGENT HELP PLEASE what is an isotope? And how do you calculate isotopes

Chemistry
1 answer:
stiv31 [10]3 years ago
4 0
Isotopes are atoms of the same element with the same number of protons but different number of neutrons. you calculate them by multiplying the abundance of the isotope by its relative atomic mass and then adding them up
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The maximum amount of nickel(II) cyanide that will dissolve in a 0.220 M nickel(II) nitrate solution is...?
sweet [91]

Answer : The maximum amount of nickel(II) cyanide is 5.84\times 10^{-12}M

Explanation :

The solubility equilibrium reaction will be:

                       Ni(CN)_2\rightleftharpoons Ni^{2+}+2CN^-

Initial conc.                        0.220       0

At eqm.                             (0.220+s)   2s

The expression for solubility constant for this reaction will be,

K_{sp}=[Ni^{2+}][CN^-]^2

Now put all the given values in this expression, we get:

3.0\times 10^{-23}=(0.220+s)\times (2s)^2

s=5.84\times 10^{-12}M

Therefore, the maximum amount of nickel(II) cyanide is 5.84\times 10^{-12}M

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2 years ago
Which of the following best describes the first step in the formation of a hurricane?
irinina [24]

I think the answer is B...

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5 0
3 years ago
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What is a molar solution?
mina [271]

Answer:

Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm³ in SI unit.

8 0
2 years ago
Calculate the number of grams in 9.00 x 10²⁶ atoms of potassium.
shutvik [7]

Answer: 5.84x10^4

Explanation: You start with (9.00x10^26 atoms)x(1 mol/ 6.022x10^23)x(39.10 g/1 mol)

6 0
1 year ago
One half of the distance between the nuclei of two atoms bonded together by a single bond is known as
german
One half of the distance between the nuclei of two atoms bonded together by a single bond is known as the covalent bond radius. When a covalent bond is present between atoms, this radius can be determined. It is the radius of the two atoms because they are equally attracted.
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3 years ago
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