Answer:
It seems there's more information in you question that you haven't posted.
7 months = 7 * (365/12) = 213 days
The half-life of chromium 51 is 27.7 days.
After 7 months, chromium 51 will have undergone 7.69 half-lives.
To solve for the ending amount we'll use the formula:
Ending Amount = Beginning Amount / 2^n where 'n' = # of half-lives
We'll say the beginning amount =1
Ending Amount = 1 / 2^7.69
Ending Amount = 0.0048426082
Basicaly if you started with 1 gram of chromium 51, after 7 months you would have 0.0048426082 grams.
Source: https://www.1728.org/halflife.htm
Step-by-step explanation:
By showing that the numbers of atoms of the same type are equal on both sides.
Answer:
by2
a−2=
6
5
a
\frac{2}{3}a-\frac{5}{6}a=2
3
2
a−
6
5
a=2
\frac{4a-5a}{6}=2
6
4a−5a
=2
\frac{-a}{6}=2
6
−a
=2
-a=2\times 6−a=2×6
-a=12−a=12
a=-12a=−12
Therefore, the value of a will be -12.
#Learn more
Solve : 3a + 4/ 2 - 6a = -2/5
Yes because the thermometer reads temperatures higher than 2.12 degrees
Answer:
a 2
im not 100% sure though
Step-by-step explanation:
