Which of the following is a compound?
Gold
Silver
Carbon Dioxide
Lead

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

b) nuclear ive learned that in a pedtrodic table

50.23 i believe is correct but don't quote me on that.

sup bro, im dumb, but this is what i found xd

"the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface"