Asample of iron has a volume of 10.0 ml. the density of iron is 7.87 g/ml. which is thecorrect expression to calculate the mass of the sample using dimensional analysis? a. 10.0 ml x 7.87g/1ml b. 10.0 ml x 1g/7.87ml c. 10.0 ml x 1ml/7.87gd. 10.0 ml x 7.87ml/1g

Explanation:

The symbol [ ] is used to indicate units, so:

Here:

Since, you know the volume of the sample (10.0 mL), the density of the iron (7.87 g/mL), and you need to find the expression to calculate the mass of the sample, you use dimensional analysis:

                   g = 10.0 mL × 7.87 g / mL is the desired expression.

When you simplify that expression you obtain:

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

the answer is c

tell me if wrong