A chemistry student was asked to calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron
(iii) oxide. his calculation is shown below :
1.20 mol O2 x 1 mol fe / 1 mol O2 = 1.20 mol Fe
Is the student correct? Use evidence to support your answer.
1.20 mol O2 x 1 mol fe / 1 mol O2 = 1.20 mol Fe
Is the student correct? Use evidence to support your answer.
1 answer:
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Answer:
m = 50.74 kg
Explanation:
We have,
Initial temperature of water is 20 degrees Celsius
Final temperature of water is 46.6 degrees Celsius
Heat absorbed is 5650 J
It is required to find the mass of the sample. The heat absorbed is given by the formula ad follows :
c is specific heat of water, c = 4.186 J/g°C
So,
So, the mass of the sample is 50.74 kg.
When sodium carbonate is dissolved in water, the equation is .
When carbon dioxide is placed in water, aqueous carbon dioxide is formed:
Some compounds are water-soluble, some are just partially soluble, while others are insoluble in water. Some soluble or partially soluble substances dissociate in water into their component ions. These substances are said to be ionic.
Sodium carbonate, like every other sodium salt, is soluble in water. It dissolves in water to form an aqueous solution of sodium carbonate.
While in solution, sodium carbonate dissociates into its component ions according to the following equation:
Carbon dioxide, on the other hand, does not dissociate in water. Instead, it dissolves in water where most of it remains as aqueous carbon dioxide in equilibrium with a small amount of hydronium ion and hydrogen carbonate ion.
Since the hydronium and hydrogen carbonate ions formed are so minute, the equation of the reaction can be written as:
More on the dissolution of substances can be found here: brainly.com/question/28580758
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