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11111nata11111 [884]
3 years ago
5

____________ or _____________ serve as nutrients for plants. please please help meee​

Chemistry
2 answers:
rosijanka [135]3 years ago
7 0

<u>Carbohydrates</u> or <u>starch</u> serve as nutrients for plants.

Dahasolnce [82]3 years ago
3 0

Answer:

<u>C</u><u>arbon, hydrogen, nitrogen, oxygen, phosphorus,</u><em>o</em><em>r</em><em> </em><u>potassium</u><em> </em><em>as</em><em> </em><em>nutrients</em><em> </em><em>for</em><em> </em><em>plants</em><em>.</em>

Explanation:

mark me as brainliest if it helped you

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You are working in the lab, how many grams of solute you need to make 200.0 g of 3.4% of solution?
Goryan [66]

Answer:

6.8g of solute are needed

Explanation:

Percent by mass, (w/w%) is defined as the mass of solute in 100g of solution. A solution that is 3.4% contains 3.4g of solute in 100g of solution. That means to make 200g of solution are required:

200g solution * (3.4g solute / 100g solution) = 6.8g of solute are needed

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3 years ago
. Calculate the mass of O2 produced if 3.450 g potassium chlorate is completely decomposed by heating in presence of a catalyst
Vesnalui [34]
 <span>2 KClO3(s) → 3 O2(g) + 2 KCl(s) 

</span><span>Note: MnO2 (Manganese Dioxide) is not part of the reaction. A catalyst lowers the activation energy and increases both forward and reverse reactions at equal rates. 
</span>
molar mass of KClO3 = 122.5
Moles of KClO3 =  3.45 / 122.55 = 0.028

Moles of O2 produce = \frac{3}{2} \times 0.028

= 0.042 moles

molar mass of O2 = 32

so, mass of O2 = 32 x 0.042  = 1.35 g



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3 years ago
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soldier1979 [14.2K]

Answer:

B

Explanation:

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almond37 [142]
The answer is Smog, hope this helps! pls mark brainliest! thanks!
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They are called Periods. Lesser known as series

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