Answer:
Explanation:
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In this case, since the decomposition of potassium chlorate is:
We can see a 2:3 mole ratio between potassium chlorate and oxygen (molar mass 32.0 g/mol), thus, via stoichiometry, we compute the mass of oxygen that are produced by the decomposition of 2.50 moles of this reactant:
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Answer:
A = 65.46 u
Explanation:
Given that,
The composition of zinc is as follows :
Zn-64 = 48.63%
Zn-66 = 27.90%
Zn-67 = 4.10%
Zn-68 = 18.75%
Zn-70 = .62%
We need to find the average atomic mass of the given element. It can be solved as follows :
So, the average atomic mass of zinc is 65.46 u.
Answer:
126.4 g of are required
Explanation:
Balanced reaction:
According to balanced reaction-
8 moles of are produced from 2 moles of
So, 8.70 moles of are produced from
moles of
or 2.175 moles of
Molar mass of = 58.12 g/mol
So, mass of required =
= 126.4 g
Hence 126.4 g of are required
Answer:
4046atm
Explanation:
For this question you can use the ideal gas law,
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Where P is pressure, V is volume, n is moles of substance, R is the constant, and T is the temperature.
Because of the units given, R will equal .08026
Then, plug in the values (I'll be excluding units for simplicity, but they all cancel out for pressure in atm):
This will give you: