What is the mass of. 15 moles of Na2S

Find change H for the reaction as it occurred in the calorimeter.

A student used a 10 ml volumetric pipet to measure and deliver an unknown liquid to a flask for density determination. the student forced all of the liquid out of the pipet with the bulb.

The density of benzene at 15 ∘C is 0.8787 g/mL. Calculate the mass of 0.1200 L of benzene at this temperature.

Explain why certain parts of the Earth are more prone to earthquakes or volcanoes.

An organic compound, X, will react with calcium metal to produce a salt with the empirical formula CaC4H4O4. What could be the identity of X? 1 ethanoic acid 2 butanedioic acid 3 2-methylpropanedioic acid

The three major groups p On the periodic table are the

Which of the following has the greatest mass, in grams? a. 1 atom of lead (Pb) b. 0.5 mol copper (Cu) atoms c. 0.3 mol gold (Au) atoms d. 25 atoms of mercury (Hg)

Which one is not a sedimentery rock a.) sandstone b.) limestone c.) quartz d. (coal

Which group is more reactive than the alkaline earth metals?

Why do you not want any of the water on the outside of the test tube to drip off into the calorimeter?