A student is trying to distinguish elements from compounds. If a substance is an element, what else must be true about it?
1 answer:
Answer: A. It can be found on the periodic table. E. It is made of only one type of atom.
Explanation: Element is the pure substance which is made up of similar atoms and cannot be separated into its components. Example : Al
Compound is the pure substance which is made up by combination of two or more elements in a fixed ratio by mass. Example :
A) Every element can be found on the periodic table.
B) Element can be a solid, liquid or a gas.
C) Elements can be separated into different components as it is made up of only single type of atoms.
D) Only solids have fixed shape and volume.
E) Elements are made up of only one type of atoms.
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Answer:- Frequency is .
Solution:- frequency and wavelength are inversely proportional to each other and the equation used is:
where, is frequency, c is speed of light and
is the wavelength.
Speed of light is .
We need to convert the wavelength from nm to m.
( )
=
Now, let's plug in the values in the equation to calculate the frequency:
= or
since,
So, the frequency of the green light photon is .
Answer : The complete question is attached in answer.
The value of K will be = 2 X
Explanation : We can use the formula as;
∆G = -RT ln K
on rearranging we get, K =
Therefore, we get,
∆G/RT = (26.81 kJ/mol ) / (0.008314 kJ/mol-K) X (298K) = 10.82
So, K =
Therefore, K = 2 X
