Tonium (T) has a molar mass of 210.0 g/mol and Changston (Ch) has a molar mass of 55.0 g/mol. The molar mass of TCh₂ is 320.0g/mol. What is the percent by mass of T?

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

Different isotopes indicate that an element will have different numbers of

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