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3 years ago

1. Describe a procedure to separate a mixture of salt, sand, and water.

1 answer:

4 0

1. A filter was used to separate the sand from the salt water solution (The process of decanting was used if a filer was not available).
2. A Bunsen burner was used to boil away the water from the salt water solution leaving only salt.

I hope this helps. Let me know if anything is unclear.

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how does photosynthesis and respiration in plants influence the amount of co2 in the atmosphere during a year?

Oliga [24]

Answer:

An increase in the amount of CO2 well increase the rate of photosynthesis, Carbon dioxide concentration will directly affect the rate of photosynthesis as it is used in the photosynthesis reaction.Increased amount of CO2 will increase the rate of photosynthesis to a certain limit, after which a further increase in its amount will no longer increase the rate any further.

Hope this helps.

Cheers! :)

8 0

3 years ago

Melissa wants to separate a mixture of many tiny beads that are all the same size. Some of the beads are made from pine wood and

Volgvan

Answer:

Your answer here is B. Add water and the wooden beads will float.

Explanation:

Please mark me as Brainliest! :)

5 0

3 years ago

Read 2 more answers

Solid carbon tetrachloride, CCl4(s), is represented by the diagram above. The attractions between the CCl4 molecules that hold t

Ne4ueva [31]

Hi, you've asked an incomplete question. Here's the diagram that completes the question.

Answer:

<u>(B) nonpolar covalent bonds</u>

Explanation:

This structure in the diagram rightly fits the description of a non-covalent bond because there is an equal sharing of electrons of Carbon (C) and Chlorine (Cl).

<em>Remember</em> too that these elements are in their solid-state, hence the CCl4 (carbon tetrachloride) molecules are held strongly together.

7 0

3 years ago

Is the maximum population that a given area can support

Anastaziya [24]

Answer:

Carry capacity

Explanation:

I took the test

Hope this helps

pls mark brainliest :3

8 0

3 years ago

Read 2 more answers

Someone please help me!!!!!!!

Tresset [83]

Answer:

Hydrogen Chloride Gas is heavier than air and sinks to the ground after being released. Firefighters closer to the ground will be subjected to significantly greater concentrations of hydrogen chloride gas than the firefighters walking on top of railcars.

Explanation:

The molar mass of air is 28.97 g/mol. Air is approximately 78% N2, which has a molar mass of 28.014 g/mol and 21% oxygen, which has a molar mass of 32 g/mol; the remaining constituents of air include CO2 and other trace amounts of gases.

The molar mass of HCl is 36.458 g/mol.

Because HCl is heavier than air, it sinks toward the ground, displacing the lighter air.

The height of railway cars is reported to vary between 13.5 ft to 15.5 ft. So firefighters on tank cars are generally above the HCl gas (although localized atmospheric conditions could cause the HCl to move higher up in the air column).

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3 years ago