2 years ago

Is a pencil falling to the floor anon contact force, a force, or a contact force

1 answer:

4 0

when the top of the pencil moves in one direction, the bottom end on the ground will move in another, but due to the frictional force it will move by a lesser amount, and the center of mass of the pencil will be accelerated in the horizontal direction due to the force of friction

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Which of the following identifies the number and location of protons in a lithium atom

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The number of protons is the atomic number

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2 years ago

Iron is extracted from its ore (hematite) in the blast furnace. Which gas is produced as a waste product?

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Answer:

CO2

Explanation:

CO2 or carbon dioxide is produced when iron is extracted from its ore. Carbon monoxide Co is used as reducing agent in iron extraction. In this reaction iron ore is reduced to iron and CO is oxidized to CO2 or carbon dioxide which is released in the process. There extraction of iron is redox reaction.

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3 years ago

Calcium is a group 2 element. Chlorine is a group 7 element. They form an ionic compound called

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Answer:

CaCl2

Explanation:

For every calcium there's 2 chlorine