The pictures below show water in a glass and oil in a beaker.

which of these statements is correct about water and oil? (2 points)

a) water is not a mineral because it is a liquid but oil is a mineral because it is formed under the ground by natural processes.

b) both water and oil are minerals because they are natural materials with a definite chemical composition.

c) water is a mineral because it has a definite chemical composition but oil is not a mineral because it is organic.

d) both water and oil are not minerals because they are liquids.

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.