What is an example of a chemical change that takes a long time to occur?
2 answers:
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Answer:
The mass of HCN is 79.65 g.
The mass of reactant which remain at the end of both reactions is 88.5 g.
Explanation:
Given that,
Mass of ammonia = 50.2 g
Mass of methane = 48.4 g
Hydrogen cyanide, HCN, can be made by a two-step process
Ammonia reacts with O₂ to give nitric oxide NO.
The reaction is,
We need to calculate the mole of NO
Using given data,
2.25 g NH_{3}=\dfrac{50.2}{17}= 2.95\ mole\ NH_{3} [/tex]
2.95 mol NH₃ will produced 2.95 mol NO
Then nitric oxide reacts with methane,
The reaction is,
We need to calculate the mole of methane
Using given data,
2 mole NO produced 2 mole HCN
2.95 mol NO will produced = 2.95 mol HCN
We need to calculate the mass of HCN
Using formula of mass
Where, N = number of mole
M = molecular mass
Put the value into the formula
The mass of HCN is 79.65 g.
We need to calculate the mass of NO
Using formula of mass
Where, N = number of mole
M = molecular mass
Put the value into the formula
Hence, The mass of HCN is 79.65 g.
The mass of reactant which remain at the end of both reactions is 88.5 g.
Answer:
47.3 ml
Explanation:
The graduated cylinder is shown in the image attached.
Now we have to take a good look at the cylinder, the lines between 45 and 50 are 46, 47, 48 and 49. Even though the points in between two lines weren't graduated but we can intelligently guess the correct volume by observing the upper meniscus of the liquid. Hence the answer.
