Molar mass of molecule x = 2 gr
Molar mass of molecule y = 32 gr
Molar mass of molecule x2 y = 18 gr Predict x and y.
A) x = H2 ; y = O2
B) x = O2 ; y = H2
C) x = H2 ; y = Cl2
D) x = Cl2 ; y = H2
1 Answers
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3.40 g of ammonia at STP occupies volume of 4.48 dm^3. Calculate molar mass of ammonia.
Given : Mass of ammonia = 3.40 g Volume at STP = 4.48 dm3 To Find : Molar mass of ammonia Calculation : Let ‘x’ grams be the molar mass of NH3. Molar volume of a gas...
2 Answers 3 views
A compound contains 4.07% hydrogen, 24.27% carbon and 71.65% chlorine by mass. Its molar mass is 98.96 g mol^(-1).
Given : Percentage of H, C and Cl = 4.07% , 24.27% and 71.65% by mass respectively. To find : Empirical formula and molecular formula Calculation : Step I : Check whether the sum of all...
2 Answers 1 views
The valence shell of the central atom of a molecule has four bond pairs of electrons. Shape of the molecule is ……………..
D) Tetrahydral
2 Answers 1 views
In a molecule AB there is a lone pair in the valence shell of central atom. The shape of molecule.
Correct option is C) Pyramidal
2 Answers 1 views
Who opined when each molecule of carbohydrate is formed, one molecule of water and one molecule of oxygen
A) C.B. Van Neil
2 Answers 1 views
Mass by mass percentage of a solution = A) mass of solute/mass of solution × 100
A) \(\cfrac{mass \,of \,solute}{mass \,of \,solution}\) × 100
2 Answers 1 views
Molar mass of 1.5055 × 10^(23) number of calcium atoms A) 20 gm B) 40 gm
Correct option is C) 10 gm
2 Answers 1 views
Convert the following in kilogram. (i) `0.91xx10^(-27)g` (Mass of electron) (ii) `3.34xx10^(-24)g` (Mass of hydrogen molecule)
Correct Answer - (i) `9.1xx10^(-3)kg` (ii) `3.34xx10^(-27)kg`
2 Answers 1 views
In DNA molecule a nitrogenous base bonded with pentose sugar molecule through a……… Bond.
Phosphodiester bond.
2 Answers 1 views
The difference in the two molar specific heat capacities of a gas is 2 calories. Calculate the mechaical equivalent of heat assuming that the molar vo
Correct Answer - `4.16Jcal^(-1)`
2 Answers 4 views