An acid is a polar substance that dissolves in water and
2 answers:
Answer: Option (d) is the correct answer.
Explanation:
According to Bronsted and Lowry, acids are the species which dissociate in water to give hydrogen ions.
Whereas bases are the species which dissociate into water to give hydroxide ions.
Also, like dissolves like. So, when an acid is polar in nature and dissolved in water then it will completely dissociate into ions.
As a result, it will tend to donate hydrogen ions into the solution.
For example,
Thus, we can conclude that an acid is a polar substance that dissolves in water and donates hydrogen ions to the solution.
Answer: d. donates hydrogen ions to the solution
Explanation:
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions when dissolved in water and an acid is defined as a substance which donates hydrogen ions
in water.
According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.
Thus an acid is a polar substance that dissolves in water and donates hydrogen ions to the solution.
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32.8 g of Butane is required and 99.3 g of CO₂ is produced
<u>Explanation:</u>
The above mentioned reaction can be written as,
C₄H₁₀(g) + 13 O₂(g) → 4CO₂(g) + 5 H₂O(g) where ΔH (rxn)= -2658 kJ
It is given that 1.5 × 10³ kJ of energy is produced, the original reaction says that 2658 kJ of heat is produced, which means that less than one mole of butane is used in the reaction.
That is
of butane reacted
Now this moles is converted into mass by multiplying it with its molar mass = 0.564 mol × 58.122 g / mol
= 32.8 g of butane.
Mass of CO₂ produced = 0.564 ×44.01 g /mol × 4 mol
= 99.3 g of CO₂
Thus 32.8 g of Butane is required and 99.3 g of CO₂ is produced
Answer:
The pressure in mmHg is 1253 (option C)
Explanation:
Two quantities are directly proportional if when multiplying or dividing one of them by a number, the other is multiplied or divided by that number. In other words, the magnitudes are directly proportional when one magnitude increases and so does the other in the same proportion; or when one magnitude decreases and so does the other in the same proportion.
The rule of three or is a way of solving proportionality problems between three known values and an unknown value, which can be applied to directly proportional quantities as follows:
a ⇒ b
c ⇒ x
So
where a, b and c are data and x is the unknown value to be calculated.
In this case, knowing that 1 Torr = 1 mmHg, the rule of three can be applied as follows: if 1 torr is equal to 1 mmHg, 1253 torr is equal to how many mmHg?
pressure= 1253 mmHg
<u><em>The pressure in mmHg is 1253 (option C)</em></u>