Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- Calculate the number of Ca^ 2+ ion in 222 g anhydrous calcium chloride? (At. mass Ca=40, Cl=35.5)
- Find the number of moles present in 0.448 L of dihydrogen at STP
- Find the number of water molecules in 1 mL of water vapours at STP?
- Calculate the number of Cl^- ions in 222 g unhydrous calcium chloride? (At. mass Ca=40, Cl =35.5)
- Find the number of millimoles for 0.160 g sodium hydroxide
- What is the number of moles present in 1 m^3 of any gas at STP?
- Find the volume of 56 g dinitrogen at STP
- Calculate number of molecules present in 5.4 g of urea (Molar mass of urea = 60 g mol^ -1 )
- Find out the total number of electrons present in 3.2 g methane?
- What is the number of hydrogen atoms present in 5.4 g of urea?
- The concentrated sulphuric acid that is peddled commercial is 95 %H_2SO_4 by weight. If the density of this commercial acid is...
- The ppm level of F^- in a 500 g sample of a tooth paste containing 0.2 g F^- is
- When CO_ 2(g) is passed over red hot coke it partially gets reduced to CO(g). Upon passing 0.5 L of CO_2(g) over red hot coke,...
- The density of a solution prepared by dissolving 120 g of urea (mol. Mass = 60u ) in 1000 g of water is 1.15 g/mL. The molarity...
- The density of 3M solution of sodium chloride is 1.252 g mL^ -1 . The molality of the solution will be : ( molar mass, NaCl = 585...
- Number of atoms in the following samples of substances is largest in:
- 10 mL of 2(M) NaOH solution is added to 200 mL of 0.5 (M) of NaOH solution. What is the final concentration ?
- Dissolving 120 g of a compound of (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/mL. The molarity of the...
- The amount of oxygen in 3.6 moles of water is:
- The amount of BaSO_4 formed upon mixing 100 mL of 20.8% BaCl_2 solution with 50 mL of 9.8% H_2SO_4 solution will be: (Ba = 137,...
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Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration