They can use carbon dating or lithium argon dating.
Answer:
C
Explanation:
The law of partial pressure states that if there is a mixture of gases which do not react chemical together, then the total pressure exerted by the mixture is the sum of the partial pressures of the individual gases that make up the mixture
Answer:
Value of
is 0.090.
Explanation:
Initial molarity of
=
= 0.0700 M
Construct an ICE table corresponding to the combustion reaction of carbon to determine 

I (M): - 0.0700 0
C (M): - -x +2x
E (M): - 0.0700-x 2x
So,
, where [CO] and
represents equilibrium concentration of CO and
respectively.
Here, ![[CO]=2x=0.060](https://tex.z-dn.net/?f=%5BCO%5D%3D2x%3D0.060)
⇒x = 0.030
So,
= 0.0700-x = (0.0700-0.030) = 0.040
Hence, 
Answer: The moles of melatonin are 0.000043
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number
of particles.
To calculate the moles, we use the equation:

Given mass of melatonin = 0.01 g
Molar mass of melatonin
= 232.28 g/mol

Thus the moles of melatonin in 0.01 g are 0.000043
B. because the other options are different sciences (biology and entomology)