Answer:
<h3>The answer is 0.25 moles</h3>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.505 × 10²³ Na atoms
We have
We have the final answer as
<h3>0.25 moles</h3>
Hope this helps you
Electrons are present in distinct energy levels around the nucleus.
Explanation:
About energy quantization at the atomic level, electrons are present in distinct energy levels around the nucleus.
This was the view from Bohr's model of the atom based on the quantum mechanics.
- His model was based on the premise that electrons can move round the nucleus only in permissible orbits or energy levels.
- An electron in an energy level has a definite amount of energy associated with it at that level.
- For electrons to undergo transition from one level to another, they gain or lose energy.
- This is the concept of the energy quantization of atomic level.
Learn more:
Neil Bohr brainly.com/question/4986277
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The dominant air currents that affect climate are known as prevailing winds. Warm winds that travel over water tend to collect moisture as they travel, the water vapor in the air will condense as it moves into colder climates. Which is why temperate coastal areas often receive heavy rainfall.
Answer:
Explanation:
Mass of Erlenmeyer flask + KHP = 84.847 g
Mass of Erlenmeyer flask = 84.347 g
Mass of KHP = .5 g
moles of KHP = .5 / 204.23
= 2.448 x 10⁻³ moles
moles of NaOH reacted = 2.448 x 10⁻³
Final buret reading = 12.25 mL
Initial buret reading = 0.50 mL
Volume of NaOH added=