Answer:
4121 years
Explanation:
From;
0.693/t1/2 = 2.303/t log No/N
t1/2= half life of the carbon-14
No= count rate of the living tissue
N= count rate of the sample
t = age of the sample
0.693/5730 =2.303/t log (13.5/8.2)
1.21 * 10^-4 = 2.303/t * 0.2165
1.21 * 10^-4 = 0.4986/t
t = 0.4986/1.21 * 10^-4
t = 4121 years
im missing something though
1. Francium
2. Nitrogen
3.rubidium
4. Krypton
Answer:
Isobutyl formate (2-methylpropyl methanoate) is an organic ester with the chemical formula C5H10O2. Used for flavor and fragrance because of its odor.
Explanation:
Answer:
Concentration of sodium nitrate solution is 0.636 mmol/L
Explanation:
We know, 
So, 
Concentration in mmol/L is defined as number of mmol of solute dissolved in 1000 mL of solution
Here solute is 
Total volume of solution = Total volume of volumetric flask = 450. mL
Hence concentration of
solution = 
So, concentration of sodium nitrate solution is 0.636 mmol/L