The concentration of the drug stock solution measures 1.5 × 10^-9 M, indicating that there are 1.5 × 10^-9 moles of the drug for every liter of solution.
To determine the number of moles in 1 ml (which is 1 × 10^-3 L), calculate: 1 × 10^-3 L × 1.5 × 10^-9 moles/1 L = 1.5 × 10^-12 moles.
Each mole of the drug consists of 6.023 × 10^23 molecules.
Thus, for 1.5 × 10^-12 moles of the drug, the corresponding number of molecules is:
1.5 × 10^-12 moles × 6.023 × 10^23 molecules/1 mole = 9.035 × 10^11 molecules.
The total number of cancer cells is 2.0 × 10^5.
The ratio hence equals the drug molecules divided by the cancer cells:
9.035 × 10^11 / 2.0 × 10^5 = 4.5 × 10^6.
A negative formation enthalpy indicates that the reaction releases heat during the process.
(C,)
Answer:
B. 26.0 μL.
Explanation:
Hello,
Considering the provided mass and density, the volume calculates to be:
Thus, the solution is B. 26.0 μL.
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