When 600.32g of Si reacts with 246.68g of N2, how many grams of Si3N4 is formed?

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

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

Can someone me with 6 to 10 plz this is for masteries test.