Some Basic Concepts of Chemistry

What is the mass of the precipitate formed when 50 mL of $16.9%$ solution of $AgNO_{3}$ is mixed with 50 mL of $5.8%$ NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5)

A mixture of $2.3g$formic acid and $4.5g$oxalic acid is treated with concentrate$H_{2}\mathrm{SO}_{4}$. The evolved gaseous mixture is passed through $\mathrm{KOH}$ pellets. What will be the weight in grams of the…

The mass of carbon anode consumed (giving only carbon dioxide) in the production of $270 \mathrm{~kg}$ of a aluminium metal from bauxite by the Hall process is: (Atomic mass : A1 = 27)

What mass of $95%$pure $\mathrm{CaCO}_{3}$ will be required to neutralise$50\mathrm{mL}$ of $0.5M\mathrm{HCl}$ solution according to the following reaction?…

Suppose the elements $X$ and $Y$ combine to form two compounds $XY_{2}$ and $X_{3}Y_{2}$. When $0.1\mathrm{mole}$ of $XY_{2}$ weighs $10g$ and $0.05\mathrm{mole}$ of $X_{3}Y_{2}$ weighs $9g$, the atomic weights of $X$…

The right option for the mass of CO2 produced by heating 20 g of 20% pure limestone is (Atomic mass of Ca=40)CaCO3$\rightarrow$1200 KCaO+CO2

An organic compound contains 80% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of C is 12 and of H is 1]

1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reaction is left in excess and how much? (At, wt. Mg=24; O=16)

$10 \mathrm{~g}$ of hydrogen and $64 \mathrm{~g}$ of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be -

The amount of carbon dioxide evolved upon complete combustion of $116$ g of $n$-butane is (Given: atomic mass in amu H $=1$, C $=12$ and O $=16$)

The numbers $17.0145$ and $21.0235$ were rounded to three figures after the decimal point. The resulting numbers, respectively, are

When $1$ dm$^3$ of $\text{CO}_2$ gas is passed over hot coke, the volume of gaseous mixture after complete reaction at STP becomes $1.4$ dm$^3$. The composition of the gaseous mixture at STP is :