chemistry saat 1 trial

If you solve 55g of a gas in 1 L pressure 20 kPa. Find the mass of the same gas at a pressure of 80 kPa

• 220g

• 137.5g

• 290g

• 310g

If NaOH molar mass is 40g/mol, so what is the mass of NaOH in a 300 mL solution with a

concentration of 3M?

• a. 10g

• b. 20g

• c. 36g

• d. 40g

what is the volume in liters needed to make a CaCl₂ with a concentration of 1M and a volume of 0.5L, if the concentration of the solution is 2M

• a. 25mL

• b. 250mL

• c. 750mL

• d. 100mL

if you know the B.P increasing constant (K_b ) is 0.5 c/m so the B.P for a water solution combination is 0.6m contains a non volatile solute.

• 97.7

• 100.5

• 100.6

• 100.3

Hydrogen ion is attached to water molecule forms the following formula

• a. H₂O^-

• b. H₂O⁺

• c. H₃O^-

• d. H₃O⁺

The solution is acidic if the H⁺ ions is ____ than OH^- ions

• a. half

• b. less than

• c. equal

• d. more than

Bronsted - Lowry suggests that base

• a. receive H⁺

• b. produce H⁺

• c. produce H

• d. produce OH+

The conjugate acid to the base NH₃ is

• a. NH₂⁺

• b. NH₃⁺

• c. NH₄⁺

• d. H⁺

Which of the following is a polyprotic acid

• a. H₃PO₄

• b. CH₃COOH

• c. HNO₃

• d. Hcl

substance that receives pair of electrons

• a. Lewis acid

• b. Lewis base

• c. Arrhenius acid

• d. Lowry acid