An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. how many protons does boron have?

The gas left in a used aerosol can is at a pressure of 103 kPa at 25.0 °C. If the can heats up to 50.0 °C, what is the pressure of the gas inside the can, assuming the volume of the can is constant? A) 112 B) 211 C) 415 D) 541

Which gas tank will empty first? acetylene (C2H2) oxygen (O2)

Which term best defines the controlled, measured addition of the amount of a solution of known concentration required to react completely with a measured amount of a solution of unknown concentration?

When the molecules of gases are heated, the average kinetic energy of the molecules increases, a. True b. False?

A clear liquid in an open container is allowed to evaporate. after three days a solid residue is left. was the original liquid an element, compound, or mixture? how do you know?

Gases are unique because it is the only phase that can be compressed can flow is composed of moving particles cannot be compressed

In a crystal lattice of an ionic compound, A. Kind of a given charge are clustered together B. Ions are surrounded by ions of the opposite charge C. A sea of electrons surrounds the ions D. Neutral molecules are present

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters? a. 1.5 moles b. 2 moles c. 3 moles d. 6 moles

The chemical symbol for sodium is A. N. B. S. C. Na. D. Sn.

What is the pressure of a mixture of co2, so2, and h2o gasses, if each gas has a partial pressure of 25 kpa?