Hello this is my first time. I am doing work in chemistry class. I have 3 questions I am stuck on.
1. For the element V, how many ground state electrons may have the quantum number n=3 and ml=-1?
I have no idea how to approach this.
2. What is the wavelength in nanometers, of a 7.91 ounce baseball thrown at 99.6 miles per hour?
1oz=28.3g (mass), 1 mile= 1609 meters.
From what I have calculated, it is 6.65x10^-26 nanometers but apparently it is wrong and I do not know why.
3. 0.683 moles of photon was absorbed by a sample of hydrogen atoms. If the wavelength of the photon was 208.5 nanometers, what is the total energy (in kj) absorbed by the sample of hydrogen atoms?
What I used for this was E=hc/(wavelength), figured out the amount of energy in J, converted to kilojoules and multiplied by 0.683. What am I doing wrong?