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mart [117]
3 years ago
9

Which statement describes a cycle of Earth's surface?

Chemistry
2 answers:
lord [1]3 years ago
5 0
The answer is .......


<span>A.Nitrogen from the atmosphere is used and replaced directly by plants on the surface.
</span>
hope it helps yall!


have a great one! :)



Elis [28]3 years ago
3 0
Its a im smart lol....................................................
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A desert area has many species of cactus and brush as well as birds, snakes, lizards, and rodents. This desert is an example of
juin [17]

Answer: Climax Commuity.

Explanation: (hope it’s right! Good luck!)

3 0
3 years ago
You are playing a game “will it float?” In this game, you are given a large, square can of tuna. If you know the density of wate
saul85 [17]

Answer:

I think it's just density of the tuna

5 0
3 years ago
3) How many moles of solute are dissolved in 1.5 L of a 0.80 M solution? * 10 points
Mrrafil [7]

Answer:

1.2

Explanation:

Molarity = moles/volume

to find the moles, you must multiply both sides by volume

so, take 1.5 L * 0.80 M

this equals 1.2 :)

7 0
3 years ago
Carboplatin (C6H12N2O4Pt) is a platinum-containing compound that is used to treat certain forms of cancer. This compound contain
givi [52]

Answer:

The answer to your question is:  $ 35.6

Explanation:

C₆H₁₂N₂O₄Pt

Platinum = 52.5 %

Price = $1047 / troy ounce

cost of platinum = ? of 2 g

1 troy ounce = 480 grains

1 grain = 64.8 mg

Process

Get 52.5 % of 2 g

                               2 g -----------------  100 %

                               x     -----------------  52.5%

                              x = (52.5 x 2) / 100

                              x = 1.05 g

                               1 g --------------------- 1000 mg

                               1.05 g ----------------   x

                               x = 1050 mg of Pt

                               1 grain ---------------- 64.8 mg

                              x            ---------------  1050 mg

                              x = 16.2 grains

                              480 grains ---------------- 1 troy ounce

                              16.2 grains ----------------   x

                               x = (16.2 x 1) / 480

                                x = 0.034 troy ounce

                              $ 1047 ------------------  1 troy ounce

                                x        -------------------  0.034

                                x = (0,034 x 1047) / 1

                                x = $ 35.6

3 0
3 years ago
Determine whether you can swim in 1.00 x 10^27 molecules of water.​
zloy xaker [14]

Answer:

We can not swim in 1.00 × 10²⁷ molecules of water

Explanation:

The given number of molecules of water = 1.00 × 10²⁷ molecules

The Avogadro's number, N_A, gives the number of molecules in one mole of a substance

N_A ≈ 6.0221409 × 10²³ molecules/mol

Therefore

Therefore, we have;

The number of moles of water present in 1.00 × 10²⁷ molecules, n = (The number of molecules of water) ÷ N_A

∴ n = (1.00 × 10²⁷ molecules)/(6.0221409 × 10²³ molecules/mol) = 1,660.53902857 moles

The mass of one mole of water = The molar mass of water = 18.01528 g/mol

The mass, 'm', of water in 1,660.53902857 moles of water is given as follows;

Mass = (The number of moles of the substance) × (The molar mass of the substance)

∴ The mass of the water in the given quantity of water, m = 1,660.53902857 moles × 18.01528 g/mol ≈ 29.9150756 kg.

The density pf water, ρ = 997 kg/m³

Volume = Mass/Density

∴ The volume of the water present in the given quantity of water, v = 29.9150756 kg/(997 kg/m³) ≈ 30.0050909 liters

The volume of the water present in 1.00 × 10²⁷ molecules of water ≈ 30.0 liters

The average volume of a human body = 62 liters

Therefore, we can not swim in the given quantity of 1.00 × 10²⁷ molecules = 30.0 liters water

7 0
3 years ago
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