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Damm [24]
3 years ago
13

A science fair project showed that sunflowers turn towards the light throughout the day. This statement should be classified as

Biology
1 answer:
notsponge [240]3 years ago
5 0
a fact.

Flowers tend to respond to stimuli
Stimuli are anything that causes arousal or enables an object to respond or react.

There are many different kinds of stimuli for which is different for every organism, for example, water, light and carbon dioxide are three stimuli and materials needed for photosynthesis in plants to manifest.
<span>In humans, we have nutrients or food, oxygen and water for us to survive. These are stimuli, eyes need light as a stimuli for it see and function. Nasal receptors needs smell as stimuli caused by molecular reactions of an object as a stimuli. And others.<span>
</span></span>
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Nitrogen gas reacts with hydrogen gas to form ammonia What are reactants in this chemical reaction?
krek1111 [17]

1 mol 2 mol  

84g of N2(g) = 84/28 = 3 mol of N2(g)  

From the above reaction 1 mol of N2(g) gives 2 mol 0f NH3(g). So 3 mol of N2(g) should give 6 mol or (6x17) 102 g of NH3(g). But we are getting only 85.0 g of NH3.  

Hence %yield of NH3 = 100x85.0/102 = 83.3%  

Answer D. is correct.  

2. 2HgO (s) --------------------- 2Hg (l) + O2 (g)  

2 mol 2 mol 1 mol  

4 mol 4 mol 2 mol  

As only 1.5 mol of O2 is obtained, so % yield = 1.5x100/2 = 75.0%  

Moreover 603 g of Hg = 603/200.59 = 3.00 molof Hg. Considering this also  

% yield = 3x100/4 = 75%

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3 years ago
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algol13

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<span>Faulting This can be regarded as a split or fracture in the Earth's outside layer commonly referred to as crust. These are related with, or frame, the limits between Earth's structural plates. In a dynamic fault, the bits of the Earth's outside layer along a rock that has faulted moves after some time. The moving rocks can cause seismic tremors and hence volcanic activities.</span>
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about six to eight hours

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