400 multiplied by 10 is 4,000.
The frequency of a wave can be calculated using the formula: frequency = speed of light / wavelength. Given that the speed of light in a vacuum is approximately 3 x 10^8 m/s, the frequency of a light wave with a wavelength of 400 nanometers would be approximately 7.5 x 10^14 Hz.
To find the number of moles in 80.00g of NaOH, you need to divide the mass in grams by the molar mass of NaOH. The molar mass of NaOH is 40 g/mol (sodium: 23g/mol, oxygen: 16g/mol, hydrogen: 1g/mol). Therefore, 80.00g / 40 g/mol = 2 moles of NaOH.