Hydrogen gas is collected over water at 21 degrees Celsius. At 21 degrees Celsius the vapor pressure of water is 18.7 torr. If the barometric pressure is 758 torr, what is the pressure of hydrogen gas?

Which compound contains both covalent and isotonic bonds? A) CaCO₂ B) CO₂ C) H₂O D) NaCl

What happens to mass in an isolated system?

What effect does the specific heat capacity of water have on weather? A. It keeps the temperatures on the coast milder. B. It lowers the temperature at which ocean water freezes. C. It stops convection currents from turning into storms. D.

As a ship is unloaded, why does it rise higher in the water? The buoyancy of the ship and its cargo decreases. The mass of the ship and its cargo increases. The density of the ship and its cargo increases.

How many atoms are in 5 grams of Fe2O3

I need to have a sentence with the word neap tide in it.

15 g of gold and 25 g of silver are mixed to form a single-phase ideal solid solution. How many moles of solution are there? What are the mole fractions of gold and silver? What is the molar entropy of mixing? What is the total entropy of mixing?

What mass of barium nitrate is dissolved in 21.29 mL of a 3.38 M solution?

State in terms of subatomic particles how an atom of C 13 is different from an atom of C 12

A compact disc has a diameter of 11.8 cm. What is the surface area of the disk in square centimeters? In square meters?