The volume of an object is 4cm3 and its mass is 42g. What is its density?

1.05 x 10^-2 kg/cm3

Explanation:

Given that,

volume of object = 4cm3

mass of object = 42g

Since the standard unit of mass is kilograms, convert 42g to kilograms

(If 1000 grams = 1kg

42 grams = 42/1000 = 0.042kg)

density of object = ?

Recall that density refers to mass per unit volume. So, apply the formula density (p) = mass (m) / volume (V)

p = 0.042kg / 4cm3

p = 0.0105 kg/cm3

Place the value of density in standard form

p = 1.05 x 10^-2 kg/cm3

Thus, the density of the object is 1.05 x 10^-2 kg/cm3

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

that's what i got you can count the number of atoms