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strojnjashka [21]
3 years ago
9

What is the approximate pressure of a storage cylinder of recovered R-404A that does not contain any non-condensable impurities

and is stored in a room where the temperature is 80°F?
Chemistry
2 answers:
Aloiza [94]3 years ago
8 0

Answer:

The answer is 173 psig

Explanation:

R404A is a mixture consisting of R-125, R-143A and R-134a. It is the substitute for R-502 for the refrigeration sector in installations for low and medium temperatures. It is characterized by its chemical stability. Its application is the new installations for low and medium temperatures. According to the pressure-temperature table for this gas that can be consulted on the Internet, at a temperature of 80°F, the pressure at which this gas is located is 173 psig.

gregori [183]3 years ago
4 0

Answer:

288 psig

Explanation:

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3 years ago
What are the columns on the periodic table called?<br> (2.5 Points)
ExtremeBDS [4]

Answer:

A group is a column of elements in the periodic table of the chemical elements.

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7 0
3 years ago
I'm not 100% sure of the answer. Explanations are highly appreciated.
PolarNik [594]

Answer:

The correct answer is

B.

\Delta H=2(1072)+498 -4(799)

Explanation:

Enthalpy of reaction :

It is the amount of energy released/absorbed when one mole of the substance is formed from the reactant at a constant pressure.

The enthalpy of a reaction can be calculated using :

\Delta H=\Delta H_{reactants}-\Delta H_{products}

2CO+O_{2}\rightarrow 2CO_{2}

\Delta H_{reactants}=2(C\equiv O)+O=O

\Delta H_{reactants}=2(1072)+498

H_{products}=2(2\times C=O)

H_{products}=4\times 799

\Delta H=\Delta H_{reactants}-\Delta H_{products}

\Delta H=2(1072)+498 -4(799)

units = \frac{kJ}{mole}

Please note that :

The carbon monoxide , CO should be taken as C triple bond O. Not C=O .

So , the bond energy =1072 is used

\Delta H=2(1072)+498 -4(799)

8 0
3 years ago
What are the names of the two magnetic poles?
gizmo_the_mogwai [7]

What are the names of the two magnetic poles?

Ur answer is

North and South

3 0
2 years ago
Read 2 more answers
The monovalent salt concentration (the predominant solute in the blood cell) for a sample of red blood cells is 0.13 moles/liter
11111nata11111 [884]

Answer:

The osmotic pressure of cell is 648.3 KPa

Explanation:

As we know the osmotic pressure is equal to

\pi = icRT

Where

i is the Van Hoff factor

c is the concentration of solution

R is the ideal gas constant

and T is the temperature.

Substituting the given values, we get -

\pi = 2 * 0.13 * 0.08206 * 300\\

\pi = 648.3 KPa

4 0
2 years ago
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