Which two samples of gas at STP contain the same total number of molecules?

(1) 1 L of CO (g) and 0.5 L of N2 (g)

(2) 2 L of CO (g) and 0.5 L of NH3 (g)

(3) 1 L of H2 (g) and 2 L of Cl2 (g)

(4) 2 L of H2 (g) and 2 L of Cl2 (g)

What is the name of the outermost layer that forms a boundary around the outside of each cell

How many atoms are in pb (no3) 2

Use the term selectively permeable in a sentence

Match each word to it's correct meaning. 1. chain reaction 2. critical mass 3. fission 4. fusion A spontaneous or induced reaction that continues to feed itself and keep itself going.

Cs: alkali metal alkaline earth metal

Which statement correctly describes the Ka of a weak acid? The Ka is large, and the equilibrium favors products. The Ka is large, and the equilibrium favors reactants. The Ka is small, and the equilibrium favors products.

True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former dump site.

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?