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How many moles of chlorine (Cl) atoms are in a sample of 1.72 x 1022 atoms?

Consider these phylogenetic trees. The first tree is based on physical characteristics. The second tree is based on structure, genetics, and evolutionary history. Which can be concluded from a comparison of the two phylogenetic trees?

Is molecular weight different from molecular mass?

How many electrons make up a charge of - 50.0 μc? Express your answer using three significant figures?

The active mass of 80g NaOh in 8 litre flask is? a) 1.0. B) 0.75 c) 0.5 d) 0.25

Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen?

Which expression represents the ΔH for a chemical reaction in terms of the potential energy, PE, of its products and reactants?

Identify the element that has a ground state electronic configuration of [ar]4s23d104p 3.

A geneticist has discovered a new compound that is made up of a small number of identical subunits. The subunits are joined end to end in long chains. Based on this information, what best can be concluded about these subunits? A. They are ketones. B.

What kind of cell keep dirt off your body's organs