25-01-2015
Chemistry

contestada

what happens to the chemical identity of a substance during a physical change?

Respuesta :

k12clee k12clee

27-01-2015

Nothing happens because a physical change only changes the appearance of the substance, whereas a chemical change transforms the substance into something completely different.
i.e. (chemical change) wood + fire = ash
(physical change) wood + axe = smaller pieces of wood

Answer Link

Otras preguntas

Which of the following is the largest Y value from the solution set of the giving system round your answer to the nearest hundredth

A 40.0 kg beam is attached to a wall with a hi.nge and its far end is supported by a cable. The angle between the beam and the cable is 90°. If the beam is incl

please help me 5 Points

(Complemento directo e indirecto) Contesta las preguntas sustituyendo las palabras subrayadas con pronombres de complemento directo e indirecto. (MODELO) ¿Me pr

The correct examples of nonrenewable resources are: petroleum, coal, and gas water, petroleum, and coal water, wind, and sunlight sun, fossil fuels, and wind

A satellite with a mass of 110 kg and a kinetic energy of 3.0 ´ 109 J must be moving at a speed of

VI. Mets les verbes au futur proche : 1.Nous ________(décorer) la table. 2.Elle _________(fermer) les portes. 3.Vous ________(réciter) une poésie. 4.Je ________

n Fig. 30.11, R = 15.0 Ω and the battery emf is 6.30 V. With switch S2 open, switch S1 is closed. After several minutes, S1 is opened and S2 is closed. (a) At 2

There are 32 orange flavoured and a few grape flavoured candies in a jar. The probability of getting a grape flavoured candy randomly from the jar is. Determine

What addition/subtraction equation should I put?