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DENIUS [597]
2 years ago
9

How many moles of oxygen gas molecules would you need to make 12.5 moles of water

Chemistry
1 answer:
horrorfan [7]2 years ago
7 0

Answer: 6.25 mol

Explanation:

From the reaction that produces water from its elements (shown in the image), we know that for every mole of oxygen gas consumed, 2 moles of water are produced.

This means that 12.5/2=<u>6.25 mol</u> of oxygen gas is needed.

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What is the radius of a hydrogen atom whose electron is bound by 0.544 ev? express your answer with the appropriate units?
insens350 [35]
First, we need to calculate the principal quantum number n for this electron, using the equation:
E = (-13.60 eV) / (n x n)
where E is the energy that is used to bound the electron (here, E = - 0.544 eV).
- 0.544 eV = (-13.60 eV) / (n x n)
n x n = (- 13.60 eV) / (- 0.544 eV)
n x n = 25
n = 5

The orbital radius that is equal to the radius of a hydrogen atom is calculated using the equation:
r = 0.053 nm x n x n
r = 0.053 nm x 5 x 5
r = 0.053 nm x 25
r = 1.325 nm
6 0
3 years ago
The recommended daily intake of potassium ( K ) is 4.725 g . The average raisin contains 3.513 mg K . Fill in the denominators o
kondor19780726 [428]

Explanation:

It is known that 1 gram contains 1000 milligrams. And, mathematically we can represent it as follows.

             \frac{1 g}{1000 mg} or \frac{1000 mg}{1 g}

So, when we have to convert grams into milligrams then we simply multiply the digit with 1000. And, if we have to convert a digit from milligrams to grams then we simply divide it by 1000.

4 0
3 years ago
What creates a thermocline?
vredina [299]

Answer:

here are the answers to all the questions on the quiz Phytoplankton

There would be no ocean life without _____.

thermocline

marine snow  

phytoplankton

runoff

Phytoplankton is the answer.

What creates a thermocline?

a series of strong ocean storms  

a difference in water temperature

a difference in the amount of phytoplankton

a change in the phytoplankton population

a difference in water temperature is the answer

What limits the growth of phytoplankton?

It is limited by the amount of water that runs off into the ocean.

It is limited by the number of fish eating the phytoplankton directly.

It is limited by the depth of the water in the ocean.  

It is limited by the amount of nutrients in the water.

It is limited by the amount of nutrients in the water is the answer

 

What are phytoplankton? (Select all that apply.)  

They are organisms that support all other life in the oceans.

They are tiny plants that drift with the currents of the ocean.

They are small plants and animals that exist both on land and in the ocean.

They are microscopic animals that drift with the currents of the wind.

They are organisms that support all other life in the oceans.

They are tiny plants that drift with the currents of the ocean.

are the answers

Which is a possible food chain in the ocean from start to finish?  

phytoplankton, zooplankton, small fish, large fish, large shark

zooplankton, phytoplankton, large fish, small fish, large shark

phytoplankton, large shark, zooplankton, large fish, small fish

large shark, large fish, small fish, zooplankton, phytoplankton

phytoplankton, zooplankton, small fish, large fish, large shark is the answer

Hope this helps!

did the quiz and got 100%

May I get braineist pls

6 0
2 years ago
Explain what helps convert non-rich oxygen blood cells back to oxygen rich cells?
Reil [10]

Answer:

As blood travels through the body, oxygen is used up, and the blood becomes oxygen poor. Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart.

Explanation:

3 0
2 years ago
All of the following are solutions except?
Vaselesa [24]

Answer:

fruit cake is the right ans

5 0
3 years ago
Read 2 more answers
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