Lead forms three oxides A,B,C The quantity of oxygen in each of the oxides A B and C is `7.143 % ,10.345% and 13.133%` respectively. Show that the law of multiple is obeyed.

Hydrogen perocide and water contain 5.9% and 11.1% of hydrogen respectively.Show that the data illustrate the law of multiple proportions.

Two oxides of a metal contain 80% and 88.8% of the metal respectively. Show that these data illustrate the law of the multiple proportions.

Carbon forms two oxides containing 42.8% , 827.3% of carbon show that the figures agree with the law of multiple proportion.

Two oxides of a metal contain 22.2% and 30% of oxygen. Show that these figures illustrates the law of multiple of proportion

Amanufacturer has three machine operators A, B and C. The first operator A produces 1% defective items, whereas the other two operators B and C produces 5% and 7% defective items, respectively. A is on the job for 50% of the time, B on the job for 30% of the time and C is on the job for 20% of the time. A defective item is produced, what is the probability that it was produced by A.

In a factory, which manufactures bolts, machines A, B and C manufacture respectively 30%, 50% and 20% of the bolts. Of their outputs, 3%, 4% and 1% respectively are defective bolts. A bolt is drawn at random from the product and is found to be defective. Find the probability that this is not manufactured by machine B.

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A,B and C, but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted ? Can you assign the correct label to each assuming the river water is relatively clean ?

A physical quantity P is related to four observables p=(a^2b^3)/sqrt(cd) .The percentage of error of measurement a,b,c,d are 1%,3%,4% and 2% respectively what is the percentage of error in the quantity P?

The heats of neutralisation of four acids A, B, C, D are -13.7, -9.4, -11.2 and -12.4 kcal respectively when they are neutralised by a common base. The acidic character obeys the order: