Answer:
3 moles of CO are needed
Explanation:
Given data:
Number of moles of CO used = ?
Mass of Fe produced = 112 g
Solution:
Chemical equation:
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Number of moles of Fe:
Number of moles = mass/ molar mass
Number of moles = 112 g/ 55.85 g/mol
Number of moles = 2.00 mol
Now we will compare the moles of iron and CO.
Fe : CO
2 : 3
Thus, 3 moles of CO are needed.
Answer:
C. Deductive reasoning
Explanation:
Deductive reasoning is a reasoning or logical process whereby a conclusion is drawn based on the belief of multiple premises that are generally assumed to be true. It is a logical process in which one or multiple statements reaches a logical conclusion.
In the question, the statement assumed to be true is that <em>noble gases are unreactive because of their electronic structures.</em>
The conclusion thus drawn from the premise is that <em>if other elements could be made to achieve noble gases electronic structures (</em><u><em>this is the reason why they are unreactive - the fact)</em></u><em> they would be more stable.</em>
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Therefore, deductive reasoning moves from a wilder reasoning to a specific (narrower) reasoning.
Answer:
mass of CH4 = 14
Molecular mass of CH4 16.04gmol
No of mole of CH4 = 14/16.04
No of mole of CH4 = 0.8728mol
Stoichiometrically, from the above
2 Molecules of Hydrogen will produce 1molecule of methane
Therefore, 2*0.8728 mole of Hydrogen will produce 0.8728mol of Methane.
The no of molecule of hydrogen is 1.7456
I am thinking it is c) A microscope is used to magnify a group of cells on a slide.
