Chemistry, 23.08.2019 10:20, ivannis875

Which set of procedures and observations indicates a chemical change?
(1) ethanol is added to an empty beaker and the ethanol eventually disappears.
(2) a solid is gently heated in a crucible and the solid slowly turns to liquid.
(3) large crystals are crushed with a mortar and pestle and become powder.
(4) a cool, shiny metal is added to water in a beaker and rapid bubbling occurs.

Answers: 1

Show answers

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 18:30, Tyrant4life

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

Answers: 2

continue

Chemistry, 22.06.2019 17:30, latezwardjr15

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

Answers: 2

continue

Chemistry, 22.06.2019 19:50, VoidedAngel

When the mercury level in a barometer decreases that atmospheric pressure has

Answers: 3

continue

Chemistry, 23.06.2019 04:50, mia36492

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table. state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?

Answers: 2

continue

Do you know the correct answer?

Which set of procedures and observations indicates a chemical change?
(1) ethanol is added to...