Which of the following vertebrates evolved in the carboniferous period? amphibians reptiles mammals fish

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure