Which of the following is equal to 1 mole?

avogadro's number

6.02 x 1023 atoms of gold

the number of water molecules in 18.01 ml of water

all of the above

Can someone me with these questions plz.

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?