Answer:
6.49 × 10⁻⁷ m (or) 649 nm
Explanation:
Wavelength and Frequency are inversely proportional to each other. Greater the wavelength smaller the frequency and vice versa.
Solution:
The relation between wavelength and frequency is as follow,
υ = c / λ
where
υ = frequency = 4.62 × 10¹⁴ s⁻¹
c = velocity of light = 3.0 × 10⁸ ms⁻¹
λ = wavenumber = <u>??</u>
Solving above equation for λ.
λ = c / υ
Putting the given values,
λ = 3.0 × 10⁸ ms⁻¹ / 4.62 × 10¹⁴ s⁻¹
Result:
λ = 6.49 × 10⁻⁷ m (or) 649 nm
Answer:
True
Explanation:
The amount of Hydrogen ion and hydroxide ion determines the acidity or alkalinity of an aqueous solution.
The higher the hydrogen ion content the higher the acidity of the solution. The increase in the amount of the hydrogen ion brings about decrease in the pH scale. The pH scale of about 0 - 2 has a very high hydrogen ion contents and as the Hydrogen ion decreases the pH value increases.
The higher the hydroxide ion contents the higher the alkalinity . The increase in the amount of hydroxide ion brings about increase in the pH value. The pH value of 12 - 14 depicts very strong alkalinity content. As the hydroxide ion increases the pH value increases.
If the hydroxide ion and hydrogen ions are of equal proportion the solution becomes neutral. The pH value for neutrality is 7.
Answer:
3rd option.
159.7g Fe2O3 / 1 mol Fe2O3
Explanation:
The correct way to write the molar mass of iron oxide as a conversion factor is illustrated below:
Mass of Fe2O3 = 159.7g
Number of mole = 1 mole
Molar Mass of Fe2O3 =?
Molar Mass = Mass /number of mole
Molar Mass =
159.7g Fe2O3 / 1 mol Fe2O3
Hundreds of them....hope it helps
An Avogadro's number (6.022 x 10^23) worth of carbon atoms have that exact mass.
12.011 is the MOLAR mass of carbon. It is the mass of 1 mole of carbon. 1 mole of anything contains 6.022 x 10^23 of that thing.