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Ratling [72]
3 years ago
6

Fertilizers have nutrients that help plants grow. Sometimes, when it rains, fertilizers are washed away from farmland into ponds

and lakes. This promotes the growth of algae, a type of plant, present in the water. It is observed that algae grow very fast and cover the surface of the pond completely. They use up all the dissolved oxygen in the pond. How does this affect the other organisms in the pond?
A) They start eating algae.
B) They do not get enough oxygen, and die.
C) They get entangled in the algae, and die.
D) They leave the pond and go to live elsewhere.
Chemistry
2 answers:
vova2212 [387]3 years ago
5 0
B) They loose oxygen due to the algae , as it says , the algae bloom uses up all the O2
Alexxx [7]3 years ago
5 0

The correct answer is B

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Ammonia (NH3) can be produced by the reaction of hydrogen gas with nitrogen gas:
klio [65]

Answer:

10%

Explanation:

Given data:

Actual yield = 0.13 moles

Percent yield = ?

Solution:

Balanced chemical equation.

3H₂ + N₂    →   2NH₃

First of all we will calculate the mass of given moles of ammonia.

Number of moles = mass / molar mass

Mass = 0.13 × 17 g/mol

Mass = 2.21 g

2.21 g is experimental yield of ammonia.

Hydrogen is limiting reactant because only two moles of hydrogen present.

we will compare the moles of hydrogen and ammonia from balance chemical equation.                

                               H₂     :    NH₃

                                3       :     2

                                2       :     2/3×2 = 1.33 moles

Mass of ammonia

Mass = number of moles × molar mass

Mass = 1.33 mol × 17 g/mol

Mass = 22.61 g

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield = 2.21 g / 22.61 g

Percent yield =9.8%  which is almost 10%

3 0
3 years ago
_Au2S3 + _H2---> _Au + _H2S
timofeeve [1]
The answer is A because if you place the first two numbers 1 and 3
Au=2
S=3
H=6
It has to equal to the product so then you put in the last two numbers 2 and 3
Au=2
S=3
H=6
4 0
2 years ago
Read 2 more answers
Please answer question #4
trasher [3.6K]

Answer:

F=500×3 = 1500 N

W = 1500×10 =15000 Nm

7 0
2 years ago
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Question 11 (1 point)
erastova [34]

Answer:

remove product

Explanation:

Removing the product will always shift the equilibrium to the right. This is based on the Le Chatelier's principle which states that "if any of the conditions of a system in equilibrium is changed, the system will adjust itself in order to annul the effect of the change".

  • If a system at equilibrium is disturbed, by changing the concentration of one of the substances all the concentrations will change until a new equilibrium point is reached.
  • Removing the product will increase the concentration of the species on the left hand side, the equilibrium will shift to the right.
5 0
3 years ago
Atomic Size: Determine which of the following element pairs is the larger one
aleksklad [387]

Answer: I think the answer is 3.) Krypton or Argon.

Explanation:

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