Explanation:
thermal changes are those in which heat exchange is involved like endothermic and exothermic
while in chemical changes collision between the reactant occurs which result into product
Answer:
See explanation
Explanation:
Microwaves work by flipping water molecules upside down, then right side up again, and so on at very high speeds, and the friction generates heat. Some glass or plastic isn't affected by the microwaves, so the molecules don't get flipped, and so no friction occurs and no heat is produced, leading to the dish not being heated up.
Answer:
The answer to your question is the second one
Explanation:
AC + B → AB + C
This is not the right answer, the reaction shown here is a single replacement reaction in which one element replaces another element that is part of a compound.
A + B + C → ABC
This is the right answer because in synthesis reactions two or more reactants bound to form only one product.
ABC → A + B + C
This answer is incorrect because this is an example of a decomposition reaction in which one reactant forms two or more products.
AB + CD → AC + BD
This is an example of double replacement reaction in which the cations and anions of the reactants are interchanged.
The density of a substance is its mass per unit volume, given by the mass divided by the volume. Density depends on the substance of concern and doesn't matter whether one has a little amount of it or a whole full of it. Therefore, the density of the two smaller pieces is now the same as the original density.
Answer:
heterogeneous : A mixture that consists of visibly different substances or phases.
homogeneous : A mixture that has the same uniform appearance and composition throughout its mass.
compound: A pure chemical substance consisting of two or more different chemical elements.
element: A substance consisting one type of atom.
