Chemistry

What will happen if more heat is applied to the following system at equilibrium? X2(g) + 3Y 2(g) ⇌ 2XY3(g); ∆H = xKJmol-1

A. the yield of XY3 will decompose B. more of XY3 will decompose C. More of X2 will react D.…

6 years ago

Calculate the mass of sodium hydroxide in 5.00 dm³ of a 0.125 mol dm‾³ solution. [NaOH = 40 g mol‾¹]

A. 0.0156 g B. 0.625 g C. 1.00 g D. 25.0 g Correct Answer: Option D D. 25.0 g Explanation…

6 years ago

Which of the following substances increases in mass when heated in air?

A. Sodium chloride B. lodine crystals C. Magnesium ribbon D. Copper (ll) oxide Correct Answer: Option C C. Magnesium ribbon

6 years ago

A substance is said to be hygroscopic if it absorbs?

A. water from the atmosphere to form a solution B. heat from the surrounding C. carbon (IV) oxide from the…

6 years ago

Which of following acids forms normal salts only?

A. Tetraoxosulphate (VI) acid B. Trioxosulphate (IV) acid C. Trioxosulphate (IV) acid D. Tetraoxophosphate (V) acid Correct Answer: Option A…

6 years ago

A major factor considered in selecting a suitable method for preparing a simple salt is its?

A. crystalline form B. melting point C. reactivity with dilute acids D. solubility in water Correct Answer: Option D D.…

6 years ago

The gas given off when NH4Cl is heated with an alkali is?

A. H2 B. Cl2 C. N2 D. NH3 Correct Answer: Option D D. NH3

6 years ago

Calculate the mass of chlorine gas which occupies a volume of 1.12 dm³ a volume of 1.12 dm³ at s.t.p [Cl = 35.5, 1 mole of gas occupies 22.4 dm³ at s. t. p ]

A. 1.80g B. 3.55g C. 7.10g D. 15.50g Correct Answer: Option B B. 3.55g Explanation 1 mole Cl2 occupy 22.4dm³…

6 years ago