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VladimirAG [237]
4 years ago
10

Precision can be defined as the

Chemistry
2 answers:
tester [92]4 years ago
6 0

precision : Precision can be defined as the  reproducible of a measured value.

Aleks [24]4 years ago
4 0
Precision can be defined as the 
<span>reproducibility of a measured value.
</span><span>
Precision is how close the measured values are to each others. In contrast with accuracy, accuracy is the </span><span>agreement between a measured value and an accepted value. Accurate data are always precise while precise data is not always accurate.</span>
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Ccl2f2 is considered to be environmentally safe and is used as a refrigerant. The heat of vaporization of ccl2f2 is 289 j/g. Wha
algol [13]

Answer:

52.08grams

Explanation:

Heat of fusion is the energy needed to transform solid water into liquid water. Hess's Law.

The temperature change Liquid water to Solid Ice. 20 degrees C --> 0 degrees C. is 20 degree C.

The heat needed for this  is =  4.184 J/(g*C) * (36 grams of water) * 20 degrees C =  3012 joules of energy.

Liquid water to solid water.

Heat of fusion of water is 335j/g = 6.02kJ/mol

The heat needed for this is 6.02 kJ/mol * 2 moles of water = 12.04 kJ = 12040 joules of energy.

Adding the  two energies, we have a total energy iof 15052 joules.

15052 joules = H(vap of CCl2F2) * grams of CCl2F2 needed = 289 J/g * x grams 15052 / 289 = 52.08 grams needed.

3 0
4 years ago
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Structure of benzylidene diacetate....​
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Explanation:

Benzal .....

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3 years ago
What do covalent bonds usually form at room temperature?.
hichkok12 [17]

Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation.

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3 years ago
Why are most anions basic in H2O? Give formulas of four anions that are not basic.
AVprozaik [17]

Answer:

The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.

Explanation:

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I need help with these chem converions pleaseeee
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Answer:

For the Extra Credit Question your answer is 6.307e+9

Explanation:

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