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Nookie1986 [14]
3 years ago
11

Describe what what food web is.​

Chemistry
1 answer:
kaheart [24]3 years ago
5 0

Answer: A lot of food chains

Explanation: A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.

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Calculate the number of moles in 25.0 g of each of the
mamaluj [8]

Answer:

A. 6.25moles

B. 0.78moles

C. 0.32moles

D. 0.15moles

E. 0.43moles

Explanation:

use

  • n = mass/molar mass

A. He

  • 25/4 = 6.25moles

B. O2

  • 25/32 = 0.78moles

C. Al(OH)3

  • 27+ 3(17) = 78
  • 25/78 = 0.32 moles

D. GaS3

  • 70+3(32) = 166
  • 25/166 = 0.15moles

E. C4H10

  • 4(12)+10(1) =58
  • 25/58 = 0.43moles
5 0
3 years ago
Consider the following oxidation-reduction reaction: 2fe3+(aq) + 2hg(l) + 2cl−(aq) → 2fe2+(aq) + hg2cl2(s). indicate the oxidizi
nirvana33 [79]

Answer:

The reducing agent is Hg (mercury) and the oxidixing agent is Cl (chlorine)

Explanation:

first find the oxidation charges of each of the different ions. All elements that are alone have a charge of 0. As you compare the reactants and products we can see that the chargers of Hg and Cl have changed.

Hg went from a charge of 0 to a charge of +1

Cl went from a charge of 0 to a charge of -1

remember when a substance gains electrons it is reducing and when a substance is losing electrons it is oxidizing.

use the acryonm

<u>OIL</u>

<u>O</u>xidizing <u>I</u>s <u>L</u>osing

<u>RIG</u>

<u>R</u>educing <u>I</u>s <u>G</u>aining

8 0
2 years ago
The diagram below shows some subatomic particles. A diagram similar to a flowchart starts with a circle labeled Atom. From there
Aleksandr-060686 [28]

Answer:

The shaded area 2 is likely to have subatomic particle that are constantly in motion. I took the test and I got it right

6 0
3 years ago
Read 2 more answers
Three isotopes of oxygen are oxygen-16 oxygen-17 and oxygen-18. true or false?
Ivanshal [37]

Answer:

Oxygen is composed of three isotopes: oxygen-16, oxygen-17 and oxygen-18 and has an average atomic mass of 15.9980 amu. Oxygen-17 has a mass of 16.992 amu and makes up 0.035% of oxygen. Oxygen-16 has a mass of 15.982 amu and Oxygen-18 has a mass of 17.984 amu.

4 0
3 years ago
A molecule of acetonitrile ch3cn contains ________ sigma bonds and ________ pi bonds.
andre [41]

A molecule of acetonitrile ch3cn contains 5 sigma bonds and 2 pi bonds.

What is acetonitrile?

Acetonitrile is a nitrile which is hydrogen cyanide where the hydrogen (H) is replaced by a methyl group (-CH 3 ). Acetonitrile is a volatile organic compound. it is also called Cyanomethane.

To know more about acetonitrile go to the given link :

brainly.com/question/14900816

3 0
2 years ago
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