According to Reference Table H, what is the vapor pressure of propanone at 45°C?(1) 22 kPa (3) 70. kPa(2) 33 kPa (4) 98 kPa

Answers

Answer 1

Answer: If we work it out with direct proportions, the vapor pressure of propanone is 56 degrees Celsius. The atmospheric pressure is about 101 kPa. If the vapor pressure is equal to the atmospheric pressure, the substance boils. Therefore, if we hold a linear proportion, 45/56 = x/101. 56x = 101*45, x = 101*45/56 = 81. The closest choice here is (3) 70 kPa.

Next time, please provide us with Reference Table H.

Answer 2

Answer:

Final answer:

Using Reference Table H, the vapor pressure of propanone at 45°C is 33 kPa.

Explanation:

The vapor pressure of a substance changes with temperature and can be accurately determined using a Reference Table H in Chemistry. From the table, we see that the vapor pressure of propanone at 45°C is 33 kPa, which corresponds to option (2). This value shows that the vapor pressure of propanone increases as the temperature rises, which is a characteristic feature of volatile substances like propanone.

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Related Questions

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Three chromium isotopes are chromium -50, chromium-52, and chromium-53.How many neutrons are in each isotope, given that chromium has an atomic number of 24?
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The half-life of cobalt-60 is 5.3 years. after __________ years, 1/4 of the original amount of cobalt-60 will remain.

Answers

The number of years required for 1/4 cobalt-60 to remain after decay is calculated as follows

after one half life 1/2 of the original mass isotope remains

after another half life 1/4 mass of original mass remains

therefore if one half life is 5.3 years then the years required

= 2 x 5.3years = 10.6 years

Answer:

10.6

Explanation:APEX

Why do ionic bonds have strong intermolecular forces? (Imfs)&
Why do covalent bonds have weak intermolecular forces? (Imfs)

Answers

The wording of your question is a bit strange (we usually don't say that bonds have IMFs and ionic compounds don't consist of molecules), but the answer to your question has to do with bond polarity. Strong IMFs are associated with very polar bonds (because increased polarity means greater magnitudes of charges at the poles and, hence, greater electrostatic attraction). Since ionic bonds involve the transfer of entire units of charge (to form cations and anions), they are highly polar (and highly polar means strong IMFs). Polarity in covalent bonds, however, does not arise from transfer of entire units of charge. Rather, they involve unequal sharing of electrons, and thus partial charge. Covalent bonds are, therefore, not as polar as ionic bonds (and less polar means weaker IMFs). I think it would be a good idea to keep in mind, though, that your question should be more along the lines of "Why are ionic bonds more polar than covalent bonds?".

Decomposition of potassium chlorate (KClO3) produces potassium chloride (KCl) and pure oxygen (O2). The balanced equation for the reaction is as follows.mc017-1.jpg
What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g/mol.)

Answers

Molar mass :

KClO₃ = 122.55 g/mol
O₂ = 32 g/mol

2 KClO₃ = 2 KCl + 3 O₂

2 x 122.55 g KClO₃ ----------> 3 x 32 g O₂
10.0 g KClO₃ ------------------> ?

Mass of O₂ = ( 10.0 x 3 x 32 ) / ( 2 x 122.55 )

Mass of O₂ = 960 / 245.1

Mass of O₂ = 3.9167 g

number of moles O₂ => 3.9167 / 32 = 0.1223 moles

1 mol -------------- 22.4 L ( at STP)
0.1223 moles ---- ?

V = 0.1223 x 22.4 / 1

V = 2.739 L

hope this helps!

Your answer is 2.74.

Determine which elements or compounds are products in the follow reaction equation: calcium + chlorine → calcium chloride A. calcium, chlorine, and calcium chloride B. calcium C. calcium and chlorine D. calcium chloride Reset Selection

Answers

Answer: D. calcium chloride

Explanation:

In reaction equations, reactants are on the left side of the arrow and products are on the right side of the arrow. So, our reactants are the elements calcium and chlorine, and our product is the compound calcium chloride.

I hope this helps! :)

Final answer:

In the given chemical reaction equation, the product is calcium chloride as it is formed from the reaction of calcium and chlorine.

Explanation:

In a chemical reaction, substances that are formed as a result of the reaction are known as products. In the given chemical equation, calcium (Ca) reacts with chlorine (Cl2) to produce calcium chloride (CaCl2). Therefore, in this reaction equation, the product is calcium chloride. The reactants, substances that exist before the reaction, are calcium and chlorine. So, the correct answer to your question is D. calcium chloride.

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In science what is acid

Answers

In science, an acid is a chemical substance that has a pH value less than 7. It is characterized by the presence of hydrogen ions (H+) when dissolved in water. Acids can donate protons or accept electrons during chemical reactions. They have sour taste, can corrode certain metals, and can turn blue litmus paper red.

Which of the following factors renders a species more susceptible to disease and infertility?

Answers

The correct answer is this one: "B. inbreeding." Inbreeding renders a species more susceptible to disease and infertility. On the other hand, Large genetic diversity tends to be perceived as beneficial so that a single disease does not wipe out a species.

Here are the choices
A. Large genetic diversity
B. inbreeding
C. crossbreeding
D. recessive traits

Answer:

inbreeding

Explanation:

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