Answer:
The boiling point increases with increased pressure up to the critical point, where the gas and liquid properties become identical.
Rivers/streams are eroded and can be eroded
Answer:
Li = M₂O
Na = M₂O₂
K = MO₂
Rb = MO₂
Cs = MO₂
Explanation:
Since the reactivity of alkali metals increases on moving down the group with the increase in atomic size, their reactivity towards oxygen increases on going down the from lithium to caesium.
Lithium being the least reactive reacts with oxygen in the air to give white lithium oxide, LiO₂.
Sodium reacts with excess oxygen when heated to form sodium peroxide, Na₂O₂
Potassium reacts with excess oxygen when heated to form potassium superoxide, KO₂
Rubidium reacts with excess oxygen when heated to form rubidium suproxide, RbO₂
Caesium reacts with excess oxygen when heated to form caesium superoxide, CsO₂
Answer:
79.4 %
Explanation:
From the question given above, the following data were obtained:
Theoretical yield = 3.4 kg
Actual yield = 2.7 kg
Percentage yield =?
Percentage yield is simply defined as the ratio of the actual yield to that of the theoretical yield multiplied by 100 i.e
Percentage yield = Actual yield/Theoretical yield × 100
With the above formula, we can obtain the percentage yield as follow:
Theoretical yield = 3.4 kg
Actual yield = 2.7 kg
Percentage yield =?
Percentage yield = Actual yield/Theoretical yield × 100
Percentage yield = 2.7/3.4 × 100
Percentage yield = 79.4 %
Thus the percentage yield is 79.4 %
