Atoms and molecules numericals

A small cubical furnace 50 by 50 by 50 cm on the inside is constructed of fireclay brick [k = 1.04 W/m. degree C] with a wall thickness of 10 cm. The inside of the furnace is maintained at 500 degree C, and the outside is maintained at 50 degree C.

The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does this atom have

Where is the crust thicker oceans or continents

What mass of solid sodium formate (of MW 68.01) must be added to 150 mL of 0.42 mol/L formic acid (HCOOH) to make a buffer solu - tion having a pH of 3.74? Ka = 0.00018 for HCOOH. Answer in units of g.

A helium balloon has a volume of 735 mL when it is at ground level. The balloon is transported to an elevation of 5km, where the pressure is only 0.8atm. At this altitude the gas occupies a volume of 1286mL.

A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘ C. How many grams of this gasoline would fill a 12.8 gal tank (1US gal=3.78L) ?

A pump contains 0.5 l of air at 203 kpa. you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of air in the pump? 0.2 l 1.0 l 2.0 l 4.0 l

How can there be snow near a giraffe's home This is actually science so yeah

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.