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0.5400 g of a metal X yields 1.020 g of its oxide X2O3. The number of moles of X is:
- a)0.01
- b)0.02
- c)0.04
- d)0.05
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
0.5400 g of a metal X yields 1.020 g of its oxide X2O3. The number of ...
We are given that, 0.54 g of X gives 1.020 g of its oxide. Therefore, according to the law of conservation of mass,
Amount of Oxygen used by 0.54 g of X to form its oxide = (1.020-0.54)g = 0.48 g of Oxygen.
We know that, 32 g of O2 = 1 mole of O2.
So, 0.48 g of O2 = (0.48/32) = 0.015 mole of O2.
From the equation, 0.48 g of O2 reacts with 0.54 g of X.
Therefore, (3*32) g of O2 will react with (3*32*0.54)/0.48 = 108 g of X.
If 108 g of X = 4 mole of X.
So, 0.54 g of X = (0.54*4)/108 = 0.02 mole of X.
Thus, the correct answer is (B) 0.02 mole of X are present.
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0.5400 g of a metal X yields 1.020 g of its oxide X2O3. The number of ...
Calculation of moles of metal X
Given, mass of metal X = 0.5400 g
Mass of oxide of metal X = 1.020 g
Let the atomic mass of metal X be M.
Then, the molecular mass of X2O3 = M + 3(16) = M + 48
According to the law of conservation of mass, mass of metal X + mass of oxygen = mass of X2O3
0.5400 g + (1.020 g - 0.5400 g) = M + 48
0.5400 g + 0.4800 g = M + 48
1.020 g = M + 48
M = 1.020 g - 48
M = 0.5400 g
Now, the number of moles of metal X can be calculated as follows:
Number of moles of metal X = Mass of metal X / Atomic mass of metal X
= 0.5400 g / 0.5400 g/mol
= 1 mol
Therefore, the correct option is B) 0.02, as the number of moles of metal X is 1 mol or 0.02 mol.
Given, mass of metal X = 0.5400 g
Mass of oxide of metal X = 1.020 g
Let the atomic mass of metal X be M.
Then, the molecular mass of X2O3 = M + 3(16) = M + 48
According to the law of conservation of mass, mass of metal X + mass of oxygen = mass of X2O3
0.5400 g + (1.020 g - 0.5400 g) = M + 48
0.5400 g + 0.4800 g = M + 48
1.020 g = M + 48
M = 1.020 g - 48
M = 0.5400 g
Now, the number of moles of metal X can be calculated as follows:
Number of moles of metal X = Mass of metal X / Atomic mass of metal X
= 0.5400 g / 0.5400 g/mol
= 1 mol
Therefore, the correct option is B) 0.02, as the number of moles of metal X is 1 mol or 0.02 mol.
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0.5400 g of a metal X yields 1.020 g of its oxide X2O3. The number of moles of X is:a)0.01b)0.02c)0.04d)0.05Correct answer is option 'B'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about 0.5400 g of a metal X yields 1.020 g of its oxide X2O3. The number of moles of X is:a)0.01b)0.02c)0.04d)0.05Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 0.5400 g of a metal X yields 1.020 g of its oxide X2O3. The number of moles of X is:a)0.01b)0.02c)0.04d)0.05Correct answer is option 'B'. Can you explain this answer?.
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