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kolbaska11 [484]
3 years ago
8

17. When does radioactive decay occur?

Chemistry
2 answers:
Gnom [1K]3 years ago
4 0
17. would be c. when the nucleus decays

 18. would be B. the electric force and nuclear forces are in opposition to each other.         hope I helped if so plz give brainlyist 
svlad2 [7]3 years ago
3 0

The correct options are as follows:

17. C.

Radioactive decay refers to the process by which an unstable atomic nucleus loses energy by giving out radiations. The radiations emit can be in form of alpha or beta particles or gamma rays. Radioactive decay is a random process, that is, one can not predict when it would happen. Radioactive decay occurs when the nucleus of an atom decay and no longer have enough binding energy to hold the atomic sub particles together.

18. B.

Radioactive decay occurs when the nucleus no longer have enough energy to hold the sub particles in the nucleus together. This situation always occur when there are excess protons or neutrons in the nucleus of the atom. In the nucleus of an atom, two forces are usually at work, nuclear and electrostatic forces. While proton experience both of these forces, neutron only experience the nuclear force. These two forces that are in opposition bring about radioactive decay.

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Mazyrski [523]
The 3rd option is the answer 
7 0
3 years ago
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Liquid nitrogen, which has a boiling point of −195.79°C, is used as a coolant and as a preservative for biological tissues. Is t
Ray Of Light [21]

Answer:

Explanation:

Entropy is measure of disorder so as we lower the temperature of gas , its entropy decreases .

Hence at - 200°C entropy of nitrogen will be less than that at - 190°C .

At freezing point ,

entropy of fusion  = latent heat / freezing temperature

= .71 kJ / ( 273 - 210 )

= 710 / 63 J mol⁻¹ K⁻¹ .

= 11.27 J mol⁻¹ K⁻¹ .

entropy of fusion = 11.27 J mol⁻¹ K⁻¹ .

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3 years ago
what temperature does water freeze using degrees Celsius and what is the basic unit for measuring mass
Olin [163]

Freezing point is the temperature at which a substance undergoes a phase transition from liquid to solid state. Water converts from liquid state to solid ice at a temperature of 0^{0}C.

Mass is the amount of matter contained in a substance. The SI unit of mass is kilogram. 1 kilogram is equal to 1000 g. One kilogram is defined as the mass of one cubic decimeter of water at the freezing point of water.

5 0
4 years ago
If the equilibrium constant of the reaction is 0.85, then which statement is true if the mass of A is 10.5 grams; the density of
snow_tiger [21]

Answer:

E. Q < K and reaction shifts right

Explanation:

Step 1: Write the balanced equation

A(s) + 3 B(l) ⇄ 2(aq) + D(aq)

Step 2: Calculate the reaction quotient (Q)

The reaction quotient, as the equilibrium constant (K), only includes aqueous and gaseous species.

Q = [C]² × [D]

Q = 0.64² × 0.38

Q = 0.15

Step 3: Compare Q with K and determine in which direction will shift the reaction

Since Q < K, the reaction will shift to the right to attain the equilibrium.

8 0
3 years ago
Activation energy is _____.
Archy [21]
<span>Activation energy is _____
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<span>an energy barrier between reactants and products
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