Which answer lists the substances A-E in order from most dense to least dense based on the facts provided. Substance A: 8.2 g/cm3
Substance B: 3.5 cm3 and 30.0 g
Substance C: 10.0 g and 40 mL
Substance D: 0.5 g/cm3
Substance E: 2.0 cm by 3.0 cm by 1.0 cm and 4.0 grams

A, B, C, D, E

B, A, E, D, C

E, A, B, C, D

D, E, C, A, B

An object has a mass of 4 grams and a volume of 2 cm3. What is the density of the object?
D=M/V

8g/cm3

2g/cm3

6g/cm3

0.5g/cm3

An object has a mass of 20.0 grams and a volume of 5.0 cubic centimeters. Give the density and indicate if the object will float or sink in water.

0.25 g/cm3

1 g/cm3

4 g/cm3

sink

float

Ithink the dna sequences may vary but the amino acid sequences are identical. 

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.