C2H6 is the most polarizable and other two are non-polar molecules
Answer:
Vitamin C and B complex is the water soluble.but in question option is A abd C so, among them vitamin C is the water soluble vitamin.
Explanation:
Because it is easily soluble in water and when there is more amount of asorbic acid it has to be mixed in urine and are released out from body.
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Answer:
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Explanation:
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Answer:
30.25°C
Explanation:
The calorimeter is an equipment used to measure the combustion enthalpy of a substance. The heat loss in the reaction is used to heat the water and the equipment. By the conservation of energy:
Qcombustion + Qcalorimeter + Qwater = 0
Because there is no phase change:
Qcalorimeter = C*ΔT, where C is the heat capacity, and ΔT the variation in temperature (final - initial)
Qwater = m*c*ΔT, where m is the mass, and c is the specific heat (4.184 J/g°C).
The molar mass of lactose is 342.3 g/mol, so the number of moles in 2.50 g is:
n = mass/molar mass
n = 2.50/342.3
n = 0.0073 mol
Qcombustion = -5652 kJ/mol * 0.0073 mol
Qcombustion = -41.28 kJ
Qcombustion = - 41280 J
Thus,
-41280 + 1630*(T - 24.58) + 1350*4.184*(T - 24.58) = 0
(T - 24.58) * (1630 + 5648.4) = 41280
7278.4(T - 24.58) = 41280
T - 24.58 = 5.67
T = 30.25°C