A gas system has an unknown pressure and an initial temperature of 299K. When the temperature is increased to 620 K the pressure is measured at 7.77 atm. The volume is constant throughout. What was the initial pressure in atm?

Suppose that 93.3 g of an unknown metal at 98.6°C is immersed in 200.0g of water at 20.5°C. After coming to thermal equilibrium, the final temperature ofthe metal and the water is 22.7°C. Given the approximate heat capacity for water of 4.

HOCl dissociative into which 2 ions

Where does the blood pick up oxygen

A pelican is born with a larger bill than other pelicans of the same species. When this pelican breeds, some of its offspring also have larger bills.

Explain why the pH of a hydrochloric acid increases when pure water is added

Calculate the coulombic force (in Newtons) felt by an electron and a proton separated by a distance of 1 angstrom. An angstrom is 10-10 meters.

Why does stirring increase the rate of dissolution? A. Stirring the solution decreases the kinetic energy of the solution. B. Stirring the solution increases the surface area of the solution. C.

How many moles of ba (oh) 2 are present in 275 ml of 0.200 m ba (oh) 2?

The molecular weight of vitamin C, CH06, is 176.12 8 mol What is the mass, in grams, of 0.000142 mol of vitamin C? Express the answer using 3 significant figures. 09

When The reaction below demonstrates which characteristic of a base? Upper C U upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper C u (upper O upper H) subscript 2 (s) plus upper N a subscript 2 upper S upper