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liberstina [14]
3 years ago
5

I have a science fair soon and I need to make a interesting experiment but I want it to be easy in the same time. Can you please

help me out
Chemistry
2 answers:
alekssr [168]3 years ago
7 0
People love anything with bacteria.
agasfer [191]3 years ago
4 0
You should make a density trap, you get different liquids with different density's ( corn starch , water , alcohol , syrup) and pour them into a big vase and the different density's will sit on top of each other . the best thing to do is to use food coloring so that  each level is a different color.
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When 500.0 g of water is decomposed by electrolysis and the yield of hydrogen is only 75.3%, how much hydrogen chloride can be m
Evgen [1.6K]

The amount of hydrogen chloride that can be made is 1064 g

Why?

The two reactions are:

2H₂O → 2H₂ + O₂ 75.3 % yield

H₂ + Cl₂ → 2HCl 69.8% yield

We have to apply a big conversion factor to go from grams of water (The limiting reactant), to grams of HCl, the final product. We have to be very careful with the coefficients and percentage yields!

500.0gH_2O*\frac{1moleH_2O}{18.01 gH_2O}*\frac{2 moles H_2}{2 moles H_2O}*\frac{2.015g H_2}{1 mole H_2}*\frac{75.3 actual g}{100 theoretical g}=42.12 g H_2

42.12H_2*\frac{1 mole H_2}{2.015gH_2}*\frac{2 moles HCl}{1 mole H_2}*\frac{36.46g}{1 mole HCl}*\frac{69.8 actualg}{100 theoreticalg} =1064gHCl

Have a nice day!

#LearnwithBrainly

7 0
4 years ago
Which of the following processes are exothermic and which are endothermic?
suter [353]

Endothermic reactions are reactions that proceed by the absorption of heat (energy) while exothermic reactions involve a release of energy.

a) Formation of frost on a car window in winter is an exothermic process as heat is liberated when liquid water freezes to form crystals

b) Formation of water condensate on a glass of ice water is an endothermic reaction since heat is absorbed by the cold water from the glass container thereby cooling it.

c) A decrease in the temperature as ammonium nitrate is added to water is an endothermic reaction

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3 years ago
Read 2 more answers
The empirical formula for a compound shows the symbols of the elements with subscripts indicating the
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smallest whole number ratios of atoms

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a student design and experiment to test how the speed of a 90kg bumper car impacts the strength of the collision of that bumper
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a student design and experiment to test

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