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Ilia_Sergeevich [38]
3 years ago
5

HELP I NEED TO KNOW ASAP!!!!

Chemistry
2 answers:
Len [333]3 years ago
7 0
A source of error is any factor that may affect the outcome of an experiment. There are countless conceivable sources of error in any experiment; you want to focus on the factors that matter most. Identify each source of error specifically and then explain how that source of error would have affected the results. Keep in mind that an "error" to a scientist does not mean "mistake"; it more closely means "uncertainty".
Many students are tempted to say "human error", but this term is vague and lazy; any decent teacher will not accept it. Instead, think about specific things that happened during the lab exercise where the end results may have been affected.
To give an example one might find in a bio lab: perhaps a water bath's temperature was not monitored very carefully and you found that an enzyme's activity was greater than you expected. In that case, you could write something like,
"The temperature of the water bath during this exercise was not monitored carefully. It is possible that it was warmer or cooler than intended, and this would have affected the enzyme activity accordingly. The fact that our enzyme activity was found to be higher than expected leads me to believe that perhaps the water bath was too warm."
stira [4]3 years ago
3 0

Answer:

Calorimetry experiment refers to the measurement of change in energy of a system by measuring the heat exchanged by the system with its surroundings. A potential source of error in this experiment is the unwanted heat loss to the environment which can reduced by adding lid and insulating its sides.  Also, the experiment must be repeated multiple times in order to obtain reliable results.

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The air inside a bicycle tire pump has 27 joules of heat conducted away from while 77.9 joules of work done are being done on it
tatyana61 [14]

Answer:

51 J

Explanation:

The air inside a bicycle tire pump has 27 joules of heat conducted away. By convention, when heat is released, it takes the negative sign, so Q = -27 J.

77.9 joules of work done are being done on the air inside a bicycle tire pump. By convention, when work is being done on the system, it takes the positive sign, so W = 77.9 J

We can calculate the change in the internal energy (ΔU) using the following expression.

ΔU = Q + W

ΔU = (-27 J) + 77.9 J

ΔU =  51 J

7 0
4 years ago
Enter the electron configuration for I+ using noble gas shorthand notation.
Maurinko [17]

Answer:

[Kr] 4d10 5s2 5p4

Explanation:

The Symbol I represents Iodine. It has atomic number of 53. The full electronic configuration is given as;

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5

However the question requested for the configuration of I+.

I+ is a cation and it simply refers to an iodine atom that has lost a single electron. The electronic configuration of I+ is given as;

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p4

Using Noble gas shorthand representation, we have;

[Kr] 4d10 5s2 5p4

6 0
3 years ago
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yarga [219]
So they stay together but can open to allow boats through. 
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How can Thermal energy be transformed into mechanical energy?
Gekata [30.6K]

Answer:

The devise used to convert thermal energy to mechanical energy are called heat enignes

5 0
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Irina-Kira [14]
The answer is D that what i think/$):):(:(:(/;/;/-$-$):(: hope it help
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