Some Basic Conc...

A mixture contains equimolar quantities of carbonates of two bivalent metals. One metal is present to the extent of $$13.5\%$$ by weight in the mixture and $$2.58$$g of the mixture on heating leaves a residue of $$1.35$$g. What percentage by weight of the other metal is there?

A precipitate of AgClAgCl and AgBrAgBr has the mass 0.40660.4066 g. On heating a current of chlorine, the AgBrAgBr is converted to AgClAgCl and the mixture loses 0.07250.0725 in mass. The %% of mass in the original mixture is (as the nearest integer) :

The leaves of a green bean plant were exposed to carbon dioxide containing the radioactive isotope of carbon $$^{14}C$$ for few hours in sunlight. A section of the plant's stem was then immediately obtained and placed on an X-ray film that blackens where exposed to radioactivity. The following diagrams show the cross-section of the stem, and the resulting autoradiograph. Why is structure $$P$$ shown radioactive?

Decreasing order of atomic weight is correct of the elements given below?

The molecular weights of $$O_2$$ and $$N_2$$ are $$32$$ and $$28$$ respectively. At $$15^0$$C, the pressure of $$1$$gm $$O_2$$ will be the same as that of $$1$$ gm $$N_2$$ in the same bottle at the temperature:

Calculate the total number of oxygen atoms present in $$1.80g$$ of glucose $$({C}_{6}{H}_{12}{O}_{6})$$.

What will be the mass percentage of a resulting solution prepared by mixing $$15\%$$ (w/w) 500 g aqueous solution of the area with $$25\%$$ (w/w) 400g aqueous solution of it?

The critical volume of a gas is 0.036 $$lit. mol^{-1}$$. The radius of the molecule will be (in cm):
(Avogadro Number = $$6 \times 10^{23}$$)

What do carbon credits signify?

What mass of propene is formed from 34.0 g of iodopropane on heating with ethanolic $$KOH$$, if the yield is 36 %?