A company wants to create a large number of ammonia molecules using the following reaction: N2 + 3 H2 → 2 NH3

Calculate the number of H2 molecules in 28.02 grams of nitrogen (N2)

Calculate the number of N2 molecules in 2.02 g of hydrogen (H2)

Calculate the number of ammonia molecules if you have 17.04 g of ammonia (NH3)

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

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 many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.