Chlorine is prepared in the laboratory by treating manganese dioxide (MnO2) with aqueous hydrochloric acid according to the reaction 4HCl(aq)+MnO2(l)+MnCl2(aq)+Cl2(g) How many grams of HCl react with 5.0 g of manganese dioxide?
Calcium carbonate reacts with aqueous HCl to given CaCl2 and CO2 according to the reaction, CaCO3(s)+2HCl(aq)→CaCl2(g)+CO2(g)+H2Ol What mass of CaCO3 is required to react completely with 25 mL of 0.75 M HCl?
A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g water and no other products. A volume of 10.0 L (measured at STP) of this welding gas is Read More …
Calculate the number of atoms in each of the following (i) 52 moles of Ar (ii) 52 u of He (iii) 52 g of He.
Use the data given in the following table to calculate the molar mass of naturally occurring argon isotopes: Isotope Isotopic molar mass Read More …
How many significant figures should be present in the answer of the following calculations? (i)=(02856×298.15×0.112/0.5785) (ii) 5 × 5.364 (iii)0.0125 + 0.7864 + 0.0215
What will be the mass of one 12C atom in g?
Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (assume the density of water to be one).
Which one of the following will have largest number of atoms? (i) 1 g Au (s) (ii) 1 g Na (s) (iii)1 g li (s) (iv) 1 g of CI2(g)
Convert the following into basic units: (i) 28.7 pm (ii) 15.15 pm (iii)25365 mg