6. Vitamin D is not really a vitamin. Explain.

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m=0.539 kg of methanol in atmospheric pressure is heated with an electric heater from T1=30.6 ∘C to its boiling point. After the heating mv=0.12 kg of the methanol is vaporized. Heating and vaporizing takes t=470.73 s with η=0.72 heater's efficiency. leave answers in 3 significant figure without rounding up a) what is the volume of methanol b) what is the energy required for heating? c) what is the energy required for vaporizing? d) what is the power of the heater? e) What is the electr. energy needed for heating and vaporizing?

nR dT nRT -)dv dX where R (= 0.08206 atm-L/mol-K or 8.314 J/mol-K) is the gas constant; n is the number of mole, V is the volume and T is the temperature. av Determine the value of (in units of L (liter) and K (Kelvin)) when n = 4.00 mol, V = 114.8L and T = 350 K (with 3 significant figures). %3D

Given: (V1/n1)=(V2/n2) P1V1= P2V2 (V1/T1)=(V2/T2) P1/T1 = P2/T2 PV=nRT R=0.0821 atm•L/mol•K A flexible container at an initial volume of 6.13 L contains 3.51 mol of gas. More gas is added until the final volume is 19.1 L. Assuming constant temperature and pressure, calculate the number of moles added to the container.

MWPV9RT v Accessibility Mode L Imm 5. If you had1080 gram s of a substance with a m olecular weight of 12.01 gram s/m ole at 75°C under 120 atm of pressure, what would the volum e of the container be? 6. If you had 75 gram s of a substance at 22°C under 2500 torr of pressure in a 12 liter container, whatis the m olecular weight?

Give an example of Comparison of Z factors for various gases.

Question 8 For some compound XY (Mol wt. of XY=130 g/mol) at 389.02 K and 1 atm, density=6.31 g/cm Cp.m P,m = 212 J/(mol.K), =0.54729 and K 3D0.316045 atm , Find Cv,m (J/mol.K) for XY at 389.02 K and 1 atm. Answer: Answer

H.W prepare 250 ml of 0.3M KOH ? K = 390 = 16 HEIM %3D

Which of the following could cause your R value to be LOWER than the literature value for the constant? (MORE THAN ONE ANSWER CAN BE SELECTED) Ovolume too high pressure is too low mass of metal is too high mass of metal is too low O volume too low temperature of gas is too high pressure is too high O temperature of gas is too low