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alexira [117]
3 years ago
8

What is an investigation that is controlled

Chemistry
1 answer:
Ivan3 years ago
7 0
A controlled investigation is a experiment that is set for example the same rule for everything
Hope this helps
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For the simple decomposition reaction
Stella [2.4K]

Answer: 7s

Explanation:

The order of the reaction is 2.

Integrated rate law for second order kinetic is determined using the formula

1/[At]=1/[Ao] +kt

But, [Ao] is the initial concentration  = 1.50 mol/L

And [At] is the final concentration  = 1/3 of initial concentration =1/3×1.5 = 0.5 mol/L

Rate constant, k = 0.2 L/mol*s

Using the formula

1/0.5=1/1.5+0.2t

Collecting like terms

1/0.5-1/1.5=0.2t

LCM = 1.5

3-1/1.5=0.2t

2/1.5=0.2t

Multiply both sides by 1/0.2

2/1.5×0.2=t

2/0.3=t

t=6.66s

t=7s

4 0
4 years ago
Air is mainly a mixture of nitrogen and oxygen. Which gas is the main component?
NARA [144]

Answer:

Nitrogen is the main component because it comprises 78% of total air while oxygen comprises 21%

.

8 0
3 years ago
Read 2 more answers
During photosynthesis, photocenters in chlorophyll capture energy from photons to excite electrons. The energized electrons are
marissa [1.9K]

One claim that supports one law of thermodynamics in photosynthesis is that energy is conserved, but the form of energy changes (Law 1).

<h3>What is photosynthesis?</h3>

Photosynthesis is a process done by plants and other organisms to obtain energy. This process implies a set of reactions that aim at converting light energy into chemical energy the organisms can use.

<h3>How is photosynthesis related to thermodynamics?</h3>

One way photosynthesis supports the laws of thermodynamics is through the first law that establishes energy is conserved, but the form of the energy can change.

This is because, in photosynthesis, the initial solar energy is transformed into chemical energy by storing the energy in carbon-hydrogen chemical bonds. This means the form of energy has changed but the energy is preserved.

Note: This question is incomplete because the graph is not given; due to this, I answered it based on general knowledge.

Learn more about photosynthesis in: brainly.com/question/1388366

4 0
2 years ago
What is kinetic energy of a 100 kg object that is moving with a speed of 15 m/s
elena-s [515]

Answer:

16875 Joules

Kg m^2 s^-2 = Joule ,so The kinetic energy of a body of mass 150 Kg moving at 15m/s is 16875 Joules.

Explanation:

6 0
3 years ago
The further away from the sun a planet is, the hotter it is. <br><br> True<br> False
a_sh-v [17]

Answer:

False

Explanation:

The farther away a planet is, the colder it is.

7 0
3 years ago
Read 2 more answers
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