What was the key design change for hfc-134a a/c systems versus CFC 12 a/c systems

1 answer:

6 0

Answer is: key design change for HFC-134a A/C systems versus CFC-12 A/C systems was quick couple service fitting and that design reduce venting and mixing of refrigerants during service.

Level of contamination is also reduced and the emission of refrigerants and greenhouse gases (sulfur dioxide, carbon dioxide) is also reduced.

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Calculate the pH of a buffer that is 0.13 M in lactic acid and 0.11 M in sodium lactate

Gelneren [198K]

Acidity of lactic acid = pKa = 3.85
Ca = 0.13M
Cs = 0.11M
Henderson-Hasselbalch equation:
pH = pKa + log(Cs/Ca)
pH = 3.85 + log(0.11M/0.13M) = 3.85 + log0,846 = 3.85 - 0.073 = 3.777

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Why is reading important in science?

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Dispelling the perception that Indian scientists are averse to advertising their work, recipient of this year's Shanti Swarup Bhatnagar prize, Dr.Eknath Ghate and Dr.Amol Dighe, said that in science, it is important to publish and publicise one's work globally.

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Look at the image shown.

Marina86 [1]

Linear molecule with two domains

Explanation:

The describe geometry of the substance fits that of a linear molecule with two domains.

This description is based on the VSEPR i.e Valence Shell Electron Pair repulsion(VSEPR) model. It states that if an atom is bonded by two or more kinds of atoms the shape is determined by the geometry of the bonds around the central atom.

The electron domain is the number of lone pairs of electron around an atom.

Here in CO₂:

there are two lone pairs and the oxygen atoms are in a 180° linear shape around the central carbon atom. The bond is made up of two O⇔C structure.

Learn more:

Valence shell brainly.com/question/10901976

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How many carbon atoms are present in 3.900 x 10-4 mol of carbon? Give your answer in scientific notation. x 10 (select) A

AnnyKZ [126]

Answer: The number of atoms of carbon present in given number of moles are $2.350\times 10^{20}$