Question

How much ATP (in solid form) do you need to weigh, in order to make 1 mL of stock solution with a concentration of 100 mM ATP? The molecular weight of ATP is 551.14

Answer 1

Answer:

mass(g) = 0.55114g

Explanation:

Given that;

Molarity (M) 100mM = 0.1M

Volume (V) = 1mL

                  =  1.0 × 10⁻³ Litre

numbers of moles =  Molarity × Volume

                               = 0.1M × 1.0 × 10⁻³ L

                               = 0.001

                               = 1.0 × 10⁻³ mol

Now, to determine the mass of ATP (in solid form) that we need to weigh;

we have our numbers of moles to be =$\frac{mass(g)}{molarmass(g)}$

where;

numbers of moles = 1.0 × 10⁻³ mol

molar mass = 551.14

mass(g) = numbers of moles × molar mass

mass(g) = 1.0 × 10⁻³ mol × 551.14

mass(g) = 0.55114g

∴ 0.55114g ATP(in solid form) is required to be weighed  in order to make 1 mL of stock solution with a concentration of 100 mM ATP.