Answer:carbon-14 levels in the atmosphere
Explanation:
When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.
Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.
Solubility
product constants are values to describe the saturation of ionic compounds with
low solubility. A saturated solution is when there is a dynamic equilibrium
between the solute dissolved, the dissociated ions, the undissolved and the
compound. It is calculated from the product of the ion concentration in the
solution. For the base, Ca(OH)2, the dissociation would be as
follows:<span>
Ca(OH)2 = Ca2+ + 2OH-
So, the expression for the solubility product constant would be as follows:
Ksp = [Ca2+] [OH-]^2
let x be the concentration of the Ca2+. So,
</span>
Ksp = [x] [2x]^2
<span>Ksp = 4x^3
You have to substitute the value of the concentration of the calcium hydroxide in the final expression which is not given in the problem statement in order to evaluate Ksp.
</span><span>
</span>
.Answer:
stay the same the conc. of a solution is the same throughout the liquid
Explanation:
You will get at first carbon dioxide by burning C:
Burn hydrogen to obtain water:
Combine them:
Now react it with Ba:
To sum up, the reaction is
, using hydrogen as a catalyst.
Answer: Option (d) is correct.
EXplanation:
The susceptibility to search for interpreted data in such a way that confirms the hypothesis is known as confirmation bias.
Scientific consensus is the collective decision or opinion of scientists in an experiment or study.
Peer view is the collective view of two or more persons in an experiment that will lead to a collective conclusion.
Selection bias is the bias that occurs because of selection of data due to which proper results are not obtained.
Therefore, when two scientists work together on an experiment but they have different hypothesis and when the scientist look at experimental results they interpret the data in different ways and come up with different conclusions, this situation is a confirmation bias.
Thus, out of the given options, option (d) is correct.
