Find the mass of 2.45 X 1023 molecules of Ca(OH),? Use: Ca = 42.0g, H = 1.25g and O = 15.7g as average atomic mass.

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution