Explanation:
From the question it can be infered that initially only parent atoms were present in the rock and no daughter atom. So, initially there was only uranium atom and no lead atom. So, in total there were 500+1500= 2000 uranium atom. And no lead tom was there.
Answer:
C). The Bohr-Rutherford model
Explanation:
The 'Bohr-Rutherford model' of the atom failed to elaborate on the attraction between some substances. It essentially targeted hydrogen atoms and failed to explain its stability across multi-electrons. The nature and processes of the chemical reactions remained unillustrated and thus, this is the key drawback of this model. Thus, <u>option C</u> is the correct answer.
Answer: convalent compounds share two elements in forming a BOND between atoms
Explanation: if you dont believe me look it up and google will give you the same answer
please give brainliest
Answer:
4.283M
Explanation:
Hi!
We are given a certain amount of CoCl2, and we are asked to make a smaller portion of it but with a stronger concentration. Dilution is a process where we use this equation: to find the unknown variable.
Think of it this way:
You put a powdered water flavor enhancer into your bottle. You put 5 drops of it, but it evenly distributes around the bottle so it tastes fine.
Now, you put it in a very small, miniscule cup. You have only a certain amount of water and 5 drops of water, but the flavor is so strong since there is less of the water. This is known as the concentration. Volume is just the water+flavor booster.
Let's convert everything to liters since the volume should be in units of liters.
250mL=0.250L
0.150mL=0.150L
Now, let's plug it in. The first two numbers go in the left side of the equation, and we do not know the concentration of the second so we will substitute a variable.
0.250(2.570)=x(0.150) <em>Isolate X.</em>
4.283=x
x=molarity of the solution
The second question asks how many mL of the first solution would you need....since the relationship of MV should be consistent, it should be all of the solution needed.