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Ganezh [65]
3 years ago
15

Pleas help me i have to submit homework i hour i will mark brainliest

Chemistry
1 answer:
steposvetlana [31]3 years ago
6 0

Answer:

I can help

Explanation:

++++++++++++++++++++++++++++

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Which of these levels of ecological organization includes the other three?
katrin2010 [14]
Answer: B
Your answer would be ecosystem because ecosystem is all the living things in an area interacting with all of the abiotic parts of the environment.
5 0
3 years ago
A compound is found to be 63.6 % N and 36.4% O. What is the empirical formula?
FromTheMoon [43]

Answer:

NO2

Explanation:

Calculate moles of Nitrogen and oxygen (assume total mass is 100g as you only have percentages therefore there is 63.6g of N and 36.4g of O) This is the ratio that they are in but you need the ratio to be in whole numbers therefore divide each number of moles by 2.275 (the moles of oxygen) to calculate the empirical formula. Hope this helps!

8 0
3 years ago
Sulfur oxidation Choose one: A. contributes to global warming due to CO2 production. B. contributes to global warming due to met
iren2701 [21]

Answer:

C . causes environmental acidification due to production of sulfuric acid.

3 0
3 years ago
The rate of O2 production by the light reactions varies with the intensity of light because light is required as the energy sour
Mademuasel [1]

Answer:

Light reaction do not depends on dark reaction because the reaction that occur in presence of light cannot occur in dark . Photolysis, one of most important light reaction cannot take place in dark.

Explanation:

If concentration of carbon dioxide is decreased by 50% then the oxygen production will not be affected because oxygen is produced from the reduction of water.

         

8 0
4 years ago
Please answer this question ASAP. This is on a homework assignment that is due tonight!! Thank you in advance! A voltaic cell em
worty [1.4K]
Ecell = E°cell - RT/vF * lnQ

R is the gas constant: 8.3145 J/Kmol
T is the temperature in kelvin: 273.15K = 0°C, 25°C = 298.15K
v is the amount of electrons, which in your example seems to be six (I'm not totally sure)
F is the Faradays constant: 96485 J/Vmol (not sure about the mol)
Q is the concentration of products divided by the concentration of reactants, in which we ignore pure solids and liquids: [Mg2+]³ / [Fe3+]²

Standard conditions is 1 mol, at 298.15K and 1 atm

To find E°cell, you have to look up the reduction potensials of Fe3+ and Mg2+, and solve like this:

E°cell = cathode - anode

Cathode is where the reduction happens, so that would be the element that recieves electrons. Anode is where the oxidation happens, so that would be the element that donates electrons. In your example Fe3+ recieves electrons, and should be considered as cathode in the equation above. 

When you have found E°cell, you can just solve with the numbers I gave you. 
7 0
3 years ago
Read 2 more answers
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