When a Person weighs himself in which system of measurement is he using

Metric
Customary

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

[ou.03jthe pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, star 1, star 2, and star 3. intensity intensity- intensity- 1000 3500 6000 8500 11000 wavelength (a) star 1 1000 3500 6000 8500 11000 1000 3500 6000 8500 11000 wavelength (a) wavelength (a) star 2 star 3 which of these statements is correct about the color of the three stars? star 2 is white in color o star 2 is yellow in color star 1 and star 3 are yellow in color star 1 and star 3 are white in color