The correct answer is approximately 1.95g. First, take (1.022*10^10)/(1.277*10^9). This is the same as time elapsed/half-life. This gives you 8, which is the number of half lives. Then multiply mass (500.3g) by (1/2)^8, resulting in 1.95g, which is the answer.
Answer:
electrophoresis is the movement of charged particles in a fluid (or it could also be a gel) under the control of a electric field
Answer:
83 mL
Explanation:
Use the dilution equation M1V1 = M2V2
M1 = 18 M
V1 = ?
M2 = 6.0 M
M2 = 250 mL
Solve for V1 --> V1 = M2V2/M1
V1 = (6.0 M)(250 mL) / (18 M) = 83 mL
Answer:
Free energy change is -7.500248 kJ/mol
Explanation:
If we have the enthalpy change and entropy change, we can find the free energy change using the equation,
ΔG = ΔH - TΔS
Temperature in K = 25°C + 273 = 298 K
ΔH for NaI = -7.50 kJ/mol
ΔS for NaI = 74 J/K mol = 0.074 kJ/K mol
Plugin the above values in the equation, we will get,
ΔG = -7.5 kJ/mol - 0.074 kJ/K mol / 298 K
= -7.5 kJ/mol - 0.000248 kJ/mol
= -7.500248 kJ/mol
