Answer:
0.2M H2C6H5O7 < 0.2M H2C2O4
Explanation:
A weak acid/base ionizes to a very small extent in water. Hence, if we say that a substance is a weak acid/base, its percentage of ionization in solution is very little.
More volume of a very weak acid is required to neutralize a strong base. Since NaOH is a strong base, the weaker acid among the duo will require more volume for neutralization.
Since H2C6H5O7 is a weaker acid than H2C2O4, equal concentration of the both acids will require less volume of H2C2O4 than H2C6H5O7 to neutralize 0.50 M NaOH.
Answer:
Mercury is the only metal that's liquid at room temperature, bromine and iodine are the other
Explanation:
11 elements are gases
Others are solid
It is A. This is because, according to your diagram, the sunlight hits the moon, and it is blocking some of the sunlight to reach the Earth. This means that it is in between both of them.
Here we have to get the moles of water generated by the combustion of vitamin C.
4 moles of water (H₂O) will generate from the combustion of vitamin C.
The vitamin C is the ascorbic acid having the molecular formula C₆H₈O₆. On decomposition it produces water (H₂O) and carbon di oxide (CO₂).
The molecular weight of ascorbic acid is 176.12 g/mole.
In this analysis 0.163g of H₂O produces from 0.400g of vitamin C.
Thus from 176.12 g of vitamin C ×176.12 = 71.768 g of H₂O will produce.
The molecular weight of H₂O is 18 g/mole. Thus 71.768 g is equivalent to = 3.98 ≅ 4
Thus 1 mole of vitamin C (ascorbic acid) produces 4 moles of water on combustion.
The balanced combustion [in presence of excess oxygen (O₂)] reaction can be written as- C₆H₈O₆ + 5O₂ = 4H₂O + 6CO₂.
Thus the moles of water generated from combustion of vitamin C is determined.