Answer: Explanation:
Atom means the smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
<u>Iron</u> means a common, inexpensive metal, often black in color, that rusts, is attracted by magnets, and is used in making steel.
the equation balanced is
3 PbI4 + 4 CrCl3 → 3 PbCl4 + 4 CrI3
Answer:
KOH(aq) + HCI(aq) -----> KCI(aq )+ H2O
base acid salt water
hope this helps :)
Explanation:
(C)
3 double bonds alternating with 3 single bonds, making it a 6 sided ring!
The question is incomplete.
The complete question is: A<span>fter
decaying for 48 hours, 1/16 of the original mass of a radioisotope sample
remains unchanged. What is the half-life of this radioisotope?
First, calculate how many half-lives have passed to reach 1/16 of the original mass.
Each time that one half-life time passes the mass reduces to half: =>
1 half-life time => 1/2
2 half-life time => 1/4
3 half-life time => 1/8
4 half-life time = > 1/16</span>
Then 4 half-life time correspond to 48 hours, and 1 half-life time corresponds to x:
4 1
---- = -----
48h x
=> x = 48 h * 1 / 4 = 12 h.
Answer: 12 h.