The molar mass of methane is 16 g/mol. The heat absorbed by the calorimeter is the sensible heat, which is the heat gained or lost during a temperature change.
Sensible heat = CΔT = (<span>2.677 kJ/°C)(27.08 - 24</span>°C)
<em>Sensible heat = 8.24 kJ</em>
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Answer:</h3>
B. The object moves some distance
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Explanation:</h3>
- Work is the product of force and distance.
- Work is done on an object when a force is applied on the object making it move some distance.
- For example; If a mason applies a force of 5 N to move a stone at a distance of 10 m, then the work done will be 50 Joules.
- Applying a force on an object without making it move some distance then there is no work done.
- Consider a boy pushing a wall really hard and the wall doesn't move even for a single inch, this means there is no work done.
Answer: 1) Adding fertilizers to soil
Explanation: Eutrophication is the presence of excess mineral and nutrients in water bodies which result into increased plant and algal growth.
Fertilizers containing nitrogen and phosphorus are used to make soil more fertile in farming. The overuse of fertilizers can cause these nutrients to runoff the farmer's fields and enter water bodies, thus leading to eutrophication.
Limestone is calcium carbonate Ca(Co3) it's dissociation equation is as follows:
Ca(CO3) <----> Ca+2 + CO3-2
but the solubility is very small
in the presence of acid by LeChatlier's Principle you can shift to the right by adding acid
H+ + CO3-2 <-----> H+CO3- (the bicarbonate ion which is really soluble)
The system will pull more and more limestone out into solution as acid is added and neutralize the acid coming from the rain.
First we convert kg to g
1kg =1000g
4.70=x(gram)
4.70×1000÷1=4700g
now:
number of moles=mass÷molarmass
number of moles=4700÷65.4
number of moles=71.86moles.
