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shusha [124]
3 years ago
5

Please Which one??? is it???

Chemistry
2 answers:
Tatiana [17]3 years ago
6 0
The 1st one. Fertilizers are like food for plants, and that's what an algae is, sorta. Trout's don't eat algae and if there's too much algae around, it gets dirty and they eventually die because of the amount of bacteria in the algae. It's the same thing if you have a fish tank.
OleMash [197]3 years ago
6 0
It’s the first one madam
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Calculate the density (in g/mL) of a liquid that has a mass of 0.115g and a volume of 0.000265 L
notsponge [240]

density is mass/volume so we do

.115/.000265

433.962 g/mL


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3 years ago
How much electric energy does a 40 W light bulb use if it is left on for 12 hours?
OlgaM077 [116]
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Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Cu2++2e−→Cu;E∘=0
Maru [420]

Answer:

Explanation:

To calculate the cell potential we use the relation:

Eº cell = Eº oxidation + Eº reduction

Now in order to determine which of the species is going to be oxidized, we have to remember that the more the value of the reduction potential is negative,  the greater its tendency to be oxidized is. In electrochemistry we use the values of the reductions potential in the tables for simplicity  because the only thing we need to do is change the sign of the reduction potential for the oxized species .

So the species that is going to be oxidized is the Aluminium, and therefore:

Eº cell = -( -1.66 V ) + 0.340 V =  5.06 V

Equally valid is to write the equation as:

Eº cell = Eº reduction for the reduced species - Eº reduction for the oxidized species

These two expressions are equivalent, choose the one you fell more comfortable but be careful with the signs.

3 0
3 years ago
(HELP ME ASAP!)
slega [8]
A) Ca(OH)2 + CO2 —> CaCO3 + H2O

B) when Ca(OH)2 is reacted with CO2, the CaCO3 produced is a precipitate which turns the solution milky
8 0
3 years ago
The outside temperature is<br> 35°C. What is the temperature in<br> K
Fittoniya [83]

Answer:

308.15

Explanation:

308.15K − 273.15 = 35°C

5 0
3 years ago
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