Chemistry, 10.07.2019 07:30 natimike10

7.a( change occurs when a material changes shape or size but the composition of the material does not change. 8. can be observed only when the substances in a sample of matter are changing into different substances. 9. materials can be classified as solids, liquids, or gases based whether their shapes definite or variable. 10. of matter states that all particles of matter are in constant motion.

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Answer from: Abrahamolve

7.A physical change occurs when a material changes shape or size but the composition of the material does not change.

8.Chemical properties can be observed only when the substances in a sample of matter are changing into different substances.

9. Materials can be classified as solids, liquids, or gases based whether their shapes and volume are definite or variable.

10. The Kinetic theory of matter states that all particles of matter are in constant motion.

Answer from: zoebtharpe

Explanation:

A change that causes no change in chemical composition of a substance is known as a physical change. This type of change can be easily measured or observed.

For example, mass, density, height, shape, size etc are all physical changes.

On the other hand, a change that leads to change in chemical composition of a substance is known as a chemical change. This change leads to formation of new substances.

For example, combustion, reactivity, toxicity etc are all chemical changes.

Kinetic theory of matter is defined as the theory which states that all particles of matter are in constant motion.

Thus, we can conclude that the given blanks are as follows.

A physical change occurs when a material changes shape or size but the composition of the material does not change. Chemical properties can be observed only when the substances in a sample of matter are changing into different substances. Materials can be classified as solids, liquids, or gases based whether their shapes and volume are definite or variable. The Kinetic theory of matter states that all particles of matter are in constant motion.

Answer from: Quest

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. $hbr$ completely dissociates to $h^+$ and $br-$ ions. a is incorrect because $h_2s$ does not fully ionize to $h^+$ and $hs^-$ ions and some remain as the compound $h_2s$ . c and d are incorrect because, $li_2o$ and $libr$ do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise, if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both $li_2o$ and $libr$ have a complete octet so can not accept any electrons which disqualifies them as acids.

Answer from: Quest

it’s previous models because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter

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