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3 years ago

5

What are the effects on global food webs if the sun's energy could no longer reach Earth

1 answer:

gogolik [260]3 years ago

6 0

They would collapse as the sun gives the producers energy to grow i.e plants through photosynthesis. Without plants most animals would die out unless humans could somehow create a food in labs without animals or plants for 6 billion people. Ultimately it would be the death of the human race and just about everything on Earth apart from some plants that live in the deep depths of the sea which have adapted to not having as much sunlight.

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Is it ture the sun moves across the sky

dlinn [17]

Answer:

Yes, this statement is true. The sun moves across our sky from east to west.

Explanation:

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3 years ago

Consider the chemical equation for the production of water: 2 H2+O2→2 H2O. If 100 grams of oxygen gas are used, what would the p

Cerrena [4.2K]

Answer:

The percentage yield of water is 66.67%.

Explanation:

$2H_2+O_2\rightarrow 2H_2O$

Mass of oxygen gas = 100 g

Moles of oxygen gas = $\frac{100 g}{32 g/mol}=3.125 mol$

According to reaction, 1 mole of oxygen gives 2 moles of water, then 3.125 moles of oxygen will give:

$\frac{2}{1}\times 3.125 mol=6.25 mol$

Mass of 6.25 moles of water :

6.25 mol × 18 g/mol = 112.5 g

Theoretical yield of water = 112.5 g

Experimental yield of water = 75 g

Percentage yield :

$=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

$=\frac{75 g}{112.5 g}\times 100=66.67\%$

The percentage yield of water is 66.67%.

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Read 2 more answers

Given the following skeleton equation, what are the coefficients for the chemicals in the reaction? __H20 + __ P4O10 = __ H3PO4

AysviL [449]

6H2O + P4O10 = 4H3PO4
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