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3 years ago

What makes up the human body? (A)many different gases (B)carbon dioxide (D)many cells (C) minerals

Chemistry

2 answers:

Novosadov [1.4K]3 years ago

7 0

D many cells tell me if I I’m wrong or right

never [62]3 years ago

4 0

Answer:

<em></em> $(B) Carbon Dioxide$ <em></em>

Explanation:

Roughly 96 percent of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen and nitrogen, with a lot of that in the form of water. The remaining 4 percent is a sparse sampling of the periodic table of elements

Hope this helps :)

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For which of the following activities might you want to hire a chemist?

Basile [38]

Answer:

OPTION (A) : Testing a rock sample for gold content

Explanation:

For testing a rock sample of gold content you will need a Chemist. To test the material, the sample is rubbed on black stone which will leave a mark on the stone. This mark is tested by applying aqua fortis i.e nitric acid on the mark. If the mark gets dissolve then the material is not gold. If the mark sustain the it is further tested by applying aqua regia i.e nitric acid and hydrochloric acid which will prove the sample is of gold if it gets dissolve on using hydrochloric acid. The purity of the sample can be checked by differing the concentration of the aqua regia and comparing it with the gold material of the known purity.

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3 years ago

Read 2 more answers

90.00 ml of 0.25 M calcium hydroxide are required to titrate 100.00 ml of hydrochloric acid. What is the molarity of the HCI?

bezimeni [28]

Answer:

50000mm u add subtract multiply divide

Explanation:

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3 years ago

Why would a scientist only use observations to formulate a theory rather than follow the scientific method?

Alenkinab [10]

Answer: Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test theories

Explanation:

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2 years ago

The elements in yellow are referred to as ___________.

Lemur [1.5K]

Answer:

Metalloids

Explanation:

hope this helps! :)

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2 years ago

How is hydrogen in heavy water different from hydrogen in normal water?

tatyana61 [14]

Answer:

I'd say the correct answer is A

Explanation:

hope this helps:)

sorry if its wrong:(

6 0

2 years ago