1.How many grams of iron are needed to form 8.8g of FeS? 2.How many liters of hydrogen can be prepared from 36g of H2O?
3.How many atoms of silver are produced from 46.4g of Ag2O?
4.How many grams of Al2S3 can be formed from 5g of S?
5.How many liters of hydrogen can be prepared from 54g of water?
6.How many moles of osmium are in 3.5 x 10^23 atoms?
7.What mass of silver oxide is needed to form 12.5g of silver?

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

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

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system