When molten material hardens and cools, what type of rock is formed?

Is vinegar an element, compound or mixture?

Whats the atomic mass of an atom

How many atoms of carbon are in 24 grams of carbon? a) 1.2 x 10²⁴ atoms b) 1.7 x 10²⁶ atoms c) 1.2 x 10²⁵ atoms d) 3.0 x 10²⁴ atoms e) 3.0 x 10²³ atoms Can anyone explain this one?

The density of gold is 19.3 g/cm3. What is the volume of a 575 gram bar of pure gold?

The presidential election of 1928 pitted Al Smith of New York against A. Theodore Roosevelt. B. John W. Davis. C. Herbert Hoover. D. Bob La Follette.

What is an element that has more valence electrons than fluorine and less energy levels than sodium?

Why can't we breathe in pure oxygen for long

In warm water conditions, female offspring hatch from eggs laid by painted turtles. Male offspring are produced under cold conditions.

It takes 53.0 J to raise the temperature of an 11.0 g piece of unknown metal from 13.0∘C to 24.2 ∘ c. What is the specific heat for the metal?

What happens to the velocity of a sound wave in air if the temperature of the air increases