The saying "oil and water do not mix" is particularly relevant to the petroleum industry. the most desirable "light crude" has an average density of about 0.82g/ml and thus floats on water. however, some of the more dense "heavy crude" will sink in the water. how dense must crude oil be to sink in water?

Explained

Explanation:

Density of water is 1 g/mL. for any liquid to float on water it's density should be less than water and for sinking in water its density should be more than water.Any other liquid with density less than 1 g/mL will float on the water surface , that is why light crude which has density of 0.82 g/mL floats on water  for crude oil to sink, it's density must be greater than 1 g/mL .

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml