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Zanzabum
3 years ago
15

Student perfotms a Benedict's test on an unknown substance. He adds reagent(the chemical required to make a color change), and n

othing happens. What can you conclude?
Chemistry
1 answer:
elixir [45]3 years ago
7 0

Answer:

Reducing sugars are absent

Explanation:

Benedict's solution is an substance used in testing sugars. It is mixture of sodium carbonate, sodium citrate and copper(II) sulfate pentahydrate. It can be used instead of Fehling's solution in testing for the presence of reducing sugars.

Reducing sugars contain the -CHO group. If there is no colour change after the addition of Benedict's solution, then we can conclude that reducing sugars are absent.

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Ivenika [448]

Answer:

never what?

Explanation:

you sure you good

8 0
3 years ago
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The sun has been up for several hours, and it has been shining on these trees. What can the trees do because they are in sunligh
Nonamiya [84]

Answer:

1. C. take in carbon from the air. The carbon is used to make energy storage

molecules.

2. b Carbon is moving into the air and out of the air at the same time

Explanation:

Question 1:

Trees are plants, which are autotrophic organisms i.e. set of organisms that are capable of producing their own food via a process called PHOTOSYNTHESIS. This photosynthetic process produces sugars (glucose) in the presence of SUNLIGHT. According to this question, the sun has been up for several hours, and has been shining on these trees. This means that the trees can take in carbo dioxide (CO2) in order to perform the process of photosynthesis. Also, the number of energy storage molecules in the trees (ATP) will INCREASE.

What can the trees do because they are in sunlight? What does this mean for the ?

8 0
3 years ago
Which of the following best describes a double-replacement reaction?
makvit [3.9K]
I believe the correct answer from the choices listed above is option B. A double-replacement reaction happens when atoms in one compound switch places with atoms in another compound. <span> It is a type of chemical </span>reaction<span> where two compounds </span>react<span>, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places. Hope this answers the question.</span>
3 0
3 years ago
What is the mass of 0.5 moles of NaCl
Debora [2.8K]

Answer:

29.25g

Explanation:

m=0.5×(23+35.5)

6 0
2 years ago
Read 2 more answers
THANK REAL HARD...... DO YOU THINK A TREE AND A BUSH IS THE SAME THING??????/ THE BOTH DO THE SAME THING SO ARE THEY THE SAME TH
kramer

Well, trees are over 20 feet tall and have trunks that are like in 2 inches and  4.5 feet about the ground.  Bushes are smaller than the trees and usually have smaller, woody, bark leafs.


Well im gonna say it would be the same,but not in size.



Hope this helps

8 0
3 years ago
Read 2 more answers
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