What is the hollowed out area at the top of a volcano

Where is aggregate generally found?

It is possible to increase a reaction rate by adding very small amounts of a catalyst, and this is because ... A. The catalyst is used over and over again during the reaction. B. Only a small amount of catalyst is needed to increase temperature. C.

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box.

What is the h + concentration for an aqueous solution with poh = 4.44 at 25 ∘c?

If you wanted to design an experiment to show that the solubility of sugar in tea varies according to the temperature, what variable would remain constant?

If a sample of gas occupies 400 ml at a pressure of 800 mm Hg, what will be it's volume if the pressure is reduced to 700 mm Hg

Why are water storage tanks usually built on towers or hilltops?

What is convection cell

One example of a decomposition reaction is the electrolysis of water. the chemical reaction can be expressed by the equation 2 h2o →2 h2 o2. the reactant (s) of this chemical reaction is/are?

When the positive ion of one compound replaces the positive ion of another compound?