19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
An aqueous solution of ethanol has density 1.025 g/mL and it is 2 M. What is the molality of this solution ?
A molal solution is one that contains one mole of a solute in
Dissolving 120g of urea (mol. wt. 60) in 1000g of water gave a solution of density 1.15 g/mL. The molarity of the solution is
What is the mole fraction of glucose in 10% w/w glucose solution?
Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is
The density of 1 M solution of NaCl is 1.0585g mL– 1. The molality of the solution is
A mixture contains 9 gram each of H O and NaCl, what is the mole fraction of NaCl?
What is the molality of a solution of 10 g NaOH in 500 g water?
A solution is made by dissolving 49 g of H2SO4 in 250 mL of water. The molarity of the solution prepared is
A solution is prepared by adding 2g of a substance A to 18 g of water. Calculate the mass percent of the solute.
The concentration of a solution or the amount of substance present in its given volume can be expressed in any of the following ways.
The amount of solute in moles per unit volume is_______.
NH3 is produced according to the following reaction: N2(g) + 3H2(g) -> 2NH3(g) In an experiment 0.25 mol of NH3 is formed when 0.5 mol of N2 is reacted with 0.5 mol of H2. What is % yield ?
If 0.5 mole of BaCl2 is mixed with 0.20 mole of Na3PO4, the maximum number of moles of Ba3(PO4)2 then can be formed is
0 3 . x x
Calculate the number of oxygen atoms required to combine with 7.0g of N2 to form N2O3 if 80% of N2 is converted into products. N O N O ->
ms ato x Therefore, X 3 10 x atoms Number of moles=Moles N 3.0 10 6.022 10 mol 160.58 / 1.6 10 A M M g mol x >> x x x >> x
If 80.00 g of X combines with 1.5 × 1023 atoms of Y to form X2Y without any of either element remaining, what is the atomic weight of X ?
1 mole of oxalic acid is treated with conc. H2SO4. The resultant gaseous mixture is passed through a solution of KOH. The mass of KOH consumed will be (where KOH absorbs CO2.) (COOH)2 CO + CO2 + H2O 2 KOH + CO2…
How many moles of ferric alum (NH ) SO Fe (SO ) .24 H2O can be made from the sample of Fe containing 0.0056 g of it ?
NaOH is formed according to the reaction 2Na O Na O -> Na O H O 2NaOH -> To make 4g of NaOH, Na required is
What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene ?
Which of the given reactions are counted as balanced reactions? (a) H +O 2H O -> (b) 4Al+3O 2Al O -> (c) Mg OH +2HNO 2Mg NO +2H O -> (d) N +3H NH -> Ans. (b) Sol. Al O Al O -> is a balanced reaction because the n…
According to the law of conservation of mass …A… has the same number of atoms of each element on both sides of the equation. Here, A refers to
Determine the empirical formula of Kelvar, used in making bullet proof vests, is 70.6% C, 4.2% H, 11.8% N and 13.4% O