Help this is due Thursday 4/23/2020
Some crystals form by incorporating H2O molecules. To know the amount of chemical we need to calculate the amount of water in them and remove it from the weight. Calculate the % of H2O in a sample of FeSO4.7H2O. Use the % equation from pg. 456 from Prentice Hall Chemistry book.

Which statement accurately describes the rock layers? layer 8 is older than layer 1. layer 3 is younger than layer 6. layer 4 and layer 10 are the same relative age. layer 2 and layer 9 are the same relative age.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml