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VladimirAG [237]
3 years ago
13

Name three differences between a rock and a mineral

Chemistry
2 answers:
erma4kov [3.2K]3 years ago
5 0
Soft,hard,smooth is the diffrence
Naddik [55]3 years ago
4 0
1. A rock is a solid formation occurs naturally in earth

2. A mineral is a chemical composition

3. Idk srry
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The pH of an acidic solution is 2.11. What is [H⁺]
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Answer:

denotes the molar hydrogen ion concentration

Explanation:

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3 years ago
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The carbon-14 content of a wooden harpoon handle found in an Inuit archaeological site was found to be 61.9% of the carbon-14 co
astraxan [27]

Answer:

3,964 years.

Explanation:

  • It is known that the decay of a radioactive isotope isotope obeys first order kinetics.
  • Half-life time is the time needed for the reactants to be in its half concentration.
  • If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).
  • Also, it is clear that in first order decay the half-life time is independent of the initial concentration.

  • The half-life of the element is 5,730 years.

  • For, first order reactions:

<em>k = ln(2)/(t1/2) = 0.693/(t1/2).</em>

Where, k is the rate constant of the reaction.

t1/2 is the half-life of the reaction.

∴ k =0.693/(t1/2) = 0.693/(5,730 years) = 1.21 x 10⁻⁴ year⁻¹.

  • Also, we have the integral law of first order reaction:

<em>kt = ln([A₀]/[A]),</em>

where, k is the rate constant of the reaction (k = 1.21 x 10⁻⁴ year⁻¹).

t is the time of the reaction (t = ??? year).

[A₀] is the initial concentration of the sample ([A₀] = 100%).

[A] is the remaining concentration of the sample ([A] = 61.9%).

∴ t = (1/k) ln([A₀]/[A]) = (1/1.21 x 10⁻⁴ year⁻¹) ln(100%/61.9%) = 3,964 years.

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4 years ago
Out of 13 students how many<br> saw themselves in the<br> horoscope?
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Explanation: Hope this helps

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What happened to the sound as vibration of an object increase in strength​
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Answer:

A.The sound becomes louder.

And

C.The sound waves get further.

Explanation:

Louder the sound it will travel long.

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List the types of friction in order from weakest to strongest
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