Description : What data does a sample of pure water irrespective of its source contains 11.1 hydrogen and 88.9 oxygen support?
Last Answer : It might have supported Proust's law or the law of definitecomposition, or law of constant composition. But unfortunately thedata used are not accurate. The correct proportions, based onrelative atomic masses of hydrogen and oxygen being 1.008 and15.999 give the results as 11.2% and 88.8%.
Description : A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal ... . What is the value of x? a) 6 litres b) 10 litres c) 30 litres d) None of these
Last Answer : C Another way for solving this sum is by choice The mixture of 60 litres has in it 24 litres of milk and 36 litres of water. (2 : 3 :: milk water) When you remove x litres from it, you ... have 30 litres of milk and 30 litres of water - i.e. milk and water are in equal proportion.
Description : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Last Answer : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Description : Pure cholesterol has a specific rotation of -32. A sample of cholesterol prepared in the lab has a specific rotation of -8. The enatiomeric excess of
Last Answer : Pure cholesterol has a specific rotation of -32. A sample of cholesterol prepared in the lab has a ... the sample of chloresterol is x%. X is :
Description : If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 gmol how many sodium atoms are there in the sample?
Last Answer : Need answer
Description : A sample of pure amine molecules is found to possess no intermolecular Hbonding. This sample is most likely : (a) 1° amine (b) 2° amine (c) 3° amine (d) all of these
Last Answer : 3° amine
Description : A sample of pure carbon dioxide, irrespective of its source contains 27.27% carbon and 72.73% oxygen. The data supports [AIIMS 1992] (A) Law of constant composition (B) Law of conservation of mass (C) Law of reciprocal proportions (D) Law of multiple proportions
Last Answer : (A) Law of constant composition
Description : If they dug up some person who was buried a couple of hundred years ago and could get a DNA sample, would it be possible to tell whether I am related to him or her?
Last Answer : answer:At most, they could tell you that you share a relation to the corps. DNA is pretty definitive. Whether or not the deceased is the same person as the headstone implicates is subject to more scrutiny than DNA results. but I’m no scientist.
Description : A sand sample has a fineness modulus of 1.95. Whether this sand can be used for concreting? Explain the procedure to bring the fineness modulus in required permissible limits. State its importance.
Last Answer : The given sand sample has a fineness modulus 1.95, which is less than prescribed limit i.e.2.2-3.2. It indicates that sand particles are finer, which is not suitable for satisfactory ... . Well graded sand is also useful for good bonding of particles and related strength criteria of concrete.
Description : What is the structure of pure iron and whether it is soft or hard ?
Last Answer : Ferrite and it is soft.