How would one know if something is an element?

A student records the value 1.5 atm on a data table. The student is measuring what?

If 32 g of sulfur combines with 32 g of oxygen, when heated, to form solid sulfur dioxide, what mass of sulfur dioxide is produced?

Which compound contains both ionic and covalent bonds? (1) ammonia (2) methane (3) sodium nitrate (4) potassium chloride

If the volume of the 0.100 M HCl delivered to 10.0ml of NaOh is 12.00ml, the NaOH concentration is: 8.33 M 0.12 M 0.10 M 12.0 M

When salt is added to water, all of the following happen except A. the water molecules surround the dissociated ions. B. the positive part of the water molecule is attracted to the negative ions. C.

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

Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?