3 years ago

According to the law of conservation of matter, which statement about chemical reactions is true?

1 answer:

4 0

The law of conservation of matter basically states that matter can’t be created or destroyed, only changed in form, so you can rule out any option that mentions destroying or creating matter. That leaves only option A. Atoms cannot be created or destroyed by chemical reactions.

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What is the mass of a metal block with a volume of 3.1cm3 and a density of 3.82 g/cm3

zepelin [54]

Answer:

11.842g

Explanation:

To find mass the formula is volume times density.

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3 years ago

Roland is measuring a physical property of an object. He records the measurement:

Vsevolod [243]

Answer:

The correct answer is density. See the explanation below, please.

Explanation:

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2 years ago

Lisa needs to buy a helium tank to fill up all the balloons. If the helium must be compressed from an original volume of 27.0L a

algol13

Answer:

$P_2=135.73psi$

Explanation:

Hello,

In this case we use the Boyle's law which allows us to understand the volume-pressure behavior as an inversely proportional relationship:

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7 0

3 years ago

Read 2 more answers

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solong [7]

Answer:

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3 years ago

A) How much CO is required for the production of Fe from 1000 tonnes of magnetite (Fe2O4). Assume that the iron ore is 100% pure

Kryger [21]

Its b im pretty sure

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2 years ago