7) What is the density of sulfur dioxide, SO2, at
STP?

The density of SO₂ is  2.858 g/L.

Explanation:

Given data:

Density of sulfur dioxide = ?

Given temperature = standard = 273 K

Given pressure = standard = 1 atm

Solution:

Formula used:

PM = dRT

P = pressure

M = molar mass

d = density

R = ideal gas constant

T = temperature

No we will put the values in formula

1 atm × 64.066 g/mol = d× 0.0821 atm.L/mol.K× 273 K

d =64.066 atm.g/mol  /22.4133atm.L/mol

d = 2.858 g/L

The density of SO₂ is  2.858 g/L.

1 a

2 d

3 a

4 c

explanation:

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.