When an electron of a hydrogen atom travels from n = 4 to n = 2, a photon of energy 4.165 × 10-19 joules is released. Calculate
2 answers:
You might be interested in
The concentration of HCl is equal to 2.54mol/L.
<h3>Mole calculation</h3>
To solve this question, one must use the molarity calculation, which corresponds to the following expression:
Thus, to find the molarity of the sample, the following calculations must be performed:
So, 0.00254 moles were added per 10ml, so we can do:
So, the concentration of HCl is equal to 2.54mol/L.
Learn more about mole calculation in: brainly.com/question/2845237
Answer:
<h2>The answer is 3.0 mL</h2>Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question
mass of aluminum = 8.1 g
density = 2.7 g/mL
It's volume is
We have the final answer as
<h3>3.0 mL</h3>Hope this helps you