(2) U-238 is the radioisotope used in dating geological formations. Uranium-238 has a half-life of 4.46 billion years, which makes it suitable to date such old formations.
The other options do not have such long durabilities and half-lives.
54 is A <span>BaCl2 hope this helps</span>
Explanation:
In order to calculate the number of moles of a compound, we will find it out as follows.
No. of moles of chromium(III) chloride =
=
= 0.63 moles
No. of moles of =
=
= 5.88 moles
No. of moles of =
=
= 1.05 moles
No. of moles of =
=
= 1.02 moles
No. of moles of KCl =
=
= 1.34 moles
No. of moles of =
=
= 1.31 moles
No. of moles of =
=
= 6.25 moles
No. of moles of =
=
= 2.27 moles
No. of moles of =
=
= 1.11 moles
Therefore, we can conclude that out of the given options contains the largest number of moles of compound.
D) The objects particles move closer together.
D Group A is soluble, and Group B is insoluble