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kvv77 [185]
3 years ago
14

In a food chain, only 10 % of energy is transferred to the next organism. True or false

Chemistry
2 answers:
snow_lady [41]3 years ago
7 0

Answer: True

Explanation:

garik1379 [7]3 years ago
6 0

Answer:

true

Explanation:

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A student needs to prepare 50.0 mL of a 1.20 M aqueous H2O2 solution. Calculate the volume of 4.9 M H2O2 stock solution that sho
Nonamiya [84]

Answer : The volume of 4.9 M H_2O_2 stock solution used to prepare the solution is, 12.24 ml

Solution : Given,

Molarity of aqueous H_2O_2 solution = 1.20 M = 1.20 mole/L

Volume of aqueous H_2O_2 solution = 50.0 ml = 0.05 L

(1 L = 1000 ml)

Molarity of H_2O_2 stock solution = 4.9 M = 4.9 mole/L

Formula used :

M_1V_1=M_2V_2

where,

M_1 = Molarity of aqueous H_2O_2 solution

M_2 = Molarity of H_2O_2 stock solution

V_1 = Volume of aqueous H_2O_2 solution

V_2 = Volume of H_2O_2 stock solution

Now put all the given values in this formula, we get the volume of H_2O_2 stock solution.

(1.20mole/L)\times (0.05L)=(4.9mole/L)\times V_2

By rearranging the term, we get

V_2=0.01224L=12.24ml

Therefore, the volume of 4.9 M H_2O_2 stock solution used to prepare the solution is, 12.24 ml

3 0
3 years ago
Which of the fallowing elements would be least reactive a) iodine b) silicon c) silver d) argon
damaskus [11]

Answer:

Noble Gases

Explanation:It's not on there but Noble gases is the least reactive element because it has 8 electrons and their outer energy is full.

5 0
3 years ago
Two students are given the starting material benzoic acid and are asked to prepare benzaldehyde. The first student starts by ref
Likurg_2 [28]

Answer:

Compound A: Benzoyl chloride

Compound B: Benzaldehyde - (tBuO)₃Al complex

Compound C: Benzaldehyde

Compound D: Benzyl alcohol

Explanation:

The lithium tri-tert-butoxyaluminum hydride that the first student used is a milder reagent than LAH and will stop reacting at the aldehyde.

The LAH that the second student used is much more reactive and will continue to reduce the benzoic acid as far as possible, going all the way to the alcohol.

See the attachment for the reaction steps.

5 0
3 years ago
Through what experiment was Thomson's "plum pudding" model proved inaccurate?
aalyn [17]

Answer:

A

Explanation:

When the particles where shot through gold foil, he found that most of the particles went through. Some scattered in various directions, and a few were even deflected back towards the source.

6 0
2 years ago
What is Metallic bond ?<br> ​
Stels [109]
<h3>( °٢° ) ₳ ₳ ₦ ₷ ₩ € r : </h3>

What is Metallic bond ?

  • Metallic bond is a force that holds atoms together in a metallic substance.

4 0
2 years ago
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