explain why noble gases are often used in technologies. Why do the properties of the gases make them useful?

What holds a proton together? A) neutron B) residual strong force C) strong nuclear force D) weak nuclear force

What are the four indications to recognize the chemical reaction?

What are the properties of nonmetals? Check all that apply. 1. Nonmetals tend to gain electrons in reactions. 2. Nonmetals are ductile an malleable. 3. Nonmetals have shiny appearance. 4. Nonmetals are poor conductors of heat and electricity. 5.

Which of the following describes gravitational force?

How many moles are in 55.0 g calcium nitrate?

If you start with 4 moles of iron and 3 moles of oxygen to produce iron oxide, what is the limiting reagent? (You will need to balance the equation first.) Fe + O2 - > Fe2O3

Is burning wood a physical change

A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen to the pressure? (note: there is no gas added to the container.)

An open-end manometer containing mercury was connected to a vessel holding a gas at a pressure of 767 torr. The atmospheric pressure was 724 torr. What is the difference in the heights of the mercury, expressed in cm?

When does raising the temperature of a gas increase its pressure? A. temperature B. volume C. number of particles D. pressure