Sodium hydroxide, naoh, is a strong base that is used in industrial synthesis and processes such as making paper.
what is the mass of 2.70 ×1022 formula units of naoh (molar mass = 40.0 g/mol)?

1.792 g

We are given;

We are required to determine the mass of NaOH in the given formula units;

1 mole of NaOH = 6.022 × 10^23 formula units

Moles of NaOH = 2.70 ×10^22 ÷  6.022 × 10^23 formula units/mol

                          = 0.0448 moles      

Moles = mass ÷ Molar mass

Therefore,

Mass = Moles × Molar mass

        = 0.0448 moles × 40.0 g/mol

        = 1.792 g

Thus, the mass of 2.70 × 10^22 formula units of NaOH is 1.792 g

i dont know

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.