What are close-toed shoes least likely to provide protection against?

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond