Imagine you have a 128 atom of skittilium with a half-life of 10 seconds. a. How many atoms would remain after 30 seconds?

b. How long would it take for the sample to reach 8 undecayed atoms?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

How do you lengthen a pattern piece? (family and consumer science, sewing)