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Rama09 [41]
3 years ago
14

A scilentific experiment is repeated, but its results cannot be repeated by others. What can you conclude about the experiment?

Chemistry
1 answer:
klasskru [66]3 years ago
6 0

If the results of the experiment on repeating are not same, it shows the results are not standard, there are some factors, which are not constant

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2.0 kg of carbon is heated from 25°C to 55°C, and absorbs 42600 joules of heat in the process.
Marrrta [24]

Answer: c = 710 J/kg°C or 0.71 J/g°C

Explanation: Heat is expressed in the formula Q = mc∆T. Derive to find the specific heat c. So the formula will become c = Q / m∆T

c = Q / m∆T

= 42600 J / 2 kg ( 55°C - 25°C )

= 710 J /kg°C

Or can be expressed by converting kg to g.

c = 0.71 J /g°C

6 0
3 years ago
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Ammonium perchlorate NH4ClO4 is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen N2
patriot [66]

Answer: 0.055 moles of O_2 are produced by the reaction of 0.055 mol of ammonium perchlorate.

Explanation:

The balanced chemical reaction for decomposition of ammonium perchlorate is:

2NH_4ClO_4\rightarrow N_2+Cl_2+2O_2+4H_2O  

According to stoichiometry :

2 moles of NH_4ClO_4 produce = 2 moles of O_2

Thus 0.055 moles of NH_4ClO_4 will produce =\frac{2}{2}\times 0.055=0.055moles of O_2

Thus 0.055 moles of O_2 are produced by the reaction of 0.055mol of ammonium perchlorate.

7 0
3 years ago
I need help with this
Lelechka [254]

Answer:

The answer is its equal to the volume of its container.

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I hope this helps! :)

7 0
3 years ago
youare given the solution of l!ad nitrate in order to obtaina yellow precipite you should mix with it if a solution a)sulphric a
Fiesta28 [93]

Answer:

B. citric acid it just makes sense

7 0
4 years ago
Soaps feel slippery on our hands because they dissolve the oil on our skin decreasing friction this is because soaps contain
Ilya [14]

Answer:

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Explanation:

Oil or Lipid + Base lead to Glycerol and Soap

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3 years ago
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