Which of the following compounds is a gas at room temperature? A : CH3CH2OH B : CH3CH2CH2CH2CH2CH2CH3 C : CH3CH2CH3 D : HOCH2CH2OH

Answers

Answer 1

Answer:

Answer:

C. $CH_3CH_2CH_3$

Explanation:

Molecules with the stronger intermolecular forces are pulled tightly together to form solid at higher temperatures and that's why the freezing point is higher.

Also, molecules with the stronger intermolecular force have greater interaction between the molecules and thus on heating do not boil easily and have high boiling point also.

Thus, melting point and boiling point increases with increase in number of carbon atoms and also increase in intermolecular forces (like hydrogen bonding, if present).

Thus, the compound which is gas at room temperature is $CH_3CH_2CH_3$ because it has least number of carbon atoms and absence of hydrogen bonding.

Answer 2

Answer:

Final answer:

Among the choices, only CH3CH2CH3 (propane) is a gas at room temperature. The other compounds, CH3CH2OH (ethanol), CH3CH2CH2CH2CH2CH2CH3 (hexane), and HOCH2CH2OH (ethylene glycol) are all liquids.

Explanation:

Among the four compounds given, compound C, which is CH3CH2CH3 (also known as propane), is a gas at room temperature. Compound A (CH3CH2OH, or ethanol), compound B (CH3CH2CH2CH2CH2CH2CH3, or hexane), and compound D (HOCH2CH2OH, or ethylene glycol) are all liquids at room temperature.

The state of a compound at room temperature depends on factors like molecular mass and intermolecular forces. Propane has a smaller molecular mass and weaker intermolecular forces than the others, making it a gas at room temperature.

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A solution has a (oh-) = 8.6 × 10-5 the poh=, ph=, (h+)=

Answers

pOh is calculated by the negative logarithm of hydroxide ions concentration. From the given value, we have:

pOH = -log(8.6 x 10 ^-5)
pOH = 4.07

To calculate the pH we use the relation of pOH and pH, expressed as:

14 = pOH + pH
pH = 14 - 4.07 = 9.93
pH = -log [H+]
[H+] = 10^-9.93 = 1.16 x 10^-3 M

Consider the following reaction: CO(g)+2H2(g)⇌CH3OH(g). The reaction between CO and H2 is carried out at a specific temperature with initial concentrations of CO = 0.29 M and H2 = 0.51 M. At equilibrium, the concentration of CH3OH is 0.14 M. Find the equilibrium constant at this temperature.

Answers

Answer:

please check image and explanation

Explanation:

First write the balance chemical reaction

CO(g)+2H2(g)⇌CH3OH(g)

To find out the equilibrium constant first need to find the concentration of each entities at equilibrium.

Rest all thing in the image

Tendons attach muscles to bones.
True
False

Answers

Absolutely true

Just in case you do get it, a ligament will attach a bone to a bone, just as a fun fact

Answer:

This is true.

Explanation:

How many significant figures does 546.000 have

Answers

This has only only three sig figs because it is 546.000 the zeros are just place holders so thus meaning they are not significant. It is just another way to write 546 because in that number there is also 3 sig figs. They are just trying to throw you off. Just watch out because if the example is 540 then it is just two significant digits, and it were to be 540. then it be three cause that "." makes the zero significant.

Answer:

Its 7

Explanation:

I took the test...

CH3COOH mc015-1.jpg CH3COO– (aq) + H+(aq)What will happen to the chemical equilibrium of the solution if CH3COONa is added?

Answers

The equilibrium will shift to the left or the backward reaction since addition of CH3COONa will add more CH3COO- ions to the solution. The formation of reactants are promoted since the reactions tends to go to a new equilibrium because of the addition.

Answer:

The equilibrium will shift to the reactants and increase the concentration of CH3COOH

Explanation:

According to Le Chatelier's principle when a system at equilibrium is subjected to a change in temperature, pressure, concentration etc then the equilibrium will shift in a direction to undo the effect of the induced change.

The given reaction is:

CH3COOH ↔ CH3COO-(aq) + H+(aq)

CH3COONa exists as ions i.e. CH3COO- and Na+. Therefore, addition of CH3COONa will introduce more CH3COO- ions into the system as a result the equilibrium will shift to the left i.e. towards the reactants and will produce more of CH3COOH

An electron has a charge identical to that of

Answers

The smallest possible particle of an element is a atom. An electron has a charge identical to that of of a proton, but with the opposite sign.

What is atom?

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. An electron has a charge identical to that of of a proton, but with the opposite sign.

Therefore, an electron has a charge identical to that of of a proton, but with the opposite sign.

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Protons! I hope that helped out!

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