Chemistry, 10.12.2020 01:00 brose0707

What statement is true? A. interia causees bodies to slow in their motion, unless they're pushed by a force.
B. Interia resist changes to the state of motion of a body.
C. Interia decelerates a body.
D. Interia is due to friction.

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Answer from: lollipop83

B. Inertia resist changes to the state of motion of a body.

Explanation:

The force of inertia is an inherent property of matter in which it allows a body to resist changes to the state of motion of the body.

According to Newton's first law of motion "a body will remain at rest or in constant motion unless if an external force acts on it".

This is the law inertia.

The ability of a body to resist changes to the motion of the body is its inertia. Therefore, the correct choice is B.

Answer from: Quest

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

Answer from: Quest

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

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