A container hold 3 gases: oxygen, carbon, dioxide, and helium. The partial pressure for two of the gases are oxygen: 3.00 atm and carbon dioxide: 4.00 atm. If the total pressure in the container is 20 atm what is the partial pressure of helium.​

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)