Answer:
One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles
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Answer:</h3>
4.227 × 10^-19 Joules
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Explanation:</h3>
Energy of a photon of light is calculated by the formula;
E = hf, where h is the plank's constant, 6.626 × 10^-34 J-s and f is the frequency.
But, f = c/λ
Where, c is the speed of light (2.998 × 10⁸ m/s), and λ is the wavelength.
Given the wavelength is 470 nm or 4.7 × 10^-7 m
Therefore;
E = hc/λ
= (6.626 × 10^-34 J-s × 2.998 × 10^8 m/s) ÷ 4.7 × 10^-7 m
= 4.227 × 10^-19 Joules
Therefore, the energy of a photon with 470 nm is 4.227 × 10^-19 Joules
Ionic Bond.
Strontium would give its one outer valence electron to Iodine to fill Iodine's outer valence ring.
Answer:
<h2>Density = 5.24 g/cm³</h2>
Explanation:
The density of a substance can be found by using the formula
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From the question
mass = 52.4 g
volume = 10 cm³
Substitute the values into the above formula and solve for the density
That's
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We have the final answer as
<h3>Density = 5.24 g/cm³</h3>
Hope this helps you
To be able to solve this problem, we must be given the
balanced chemical equation:
3A + 5B + 1C ---> 2D + 1E
Our reactant A is called the limiting reactant because it
is limited in amount which is only 6 moles. So we based our calculation on that
reactant alone.
From stoichiometry, we have 1 mole of E for every 3 moles
of A, therefore:
moles E = 6 moles A * (1 mole E / 3 moles A)
moles E = 2 moles
