Look at the chemical equation:
3h2 + n2- 2nh3
how many atoms of hydrogen (h) are present on both sides of the equation?

Embryos of different species look very similar, which shows that the organisms share a ancestor.

An ice cube with a volume of 45.0ml and a density of 0.9000g/cm3 floats in a liquid with a density of 1.36g/ml. what volume of the cube is submerged in the liquid

Astudent uses universal ph paper to find the ph of three solutions . solution a has a ph of 5 solution b has a ph of 11 and solution c has a ph of 7 identify which solution is acidic which solution is neutral and which solution is basic