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3 years ago

Consider the following reaction: CO(g)+2H2(g) <--> CH3OH(g).

Chemistry

1 answer:

Andrew [12]3 years ago

4 0

Answer:

123 is the equilibrium constant for the reaction.

Explanation:

$CO(g)+2H_2(g)\rightleftharpoons CH_3OH(g)$

Equilibrium concentration of reactants :

$[CO]=0.115 M,[H_2]=0.116 M$

Equilibrium concentration of products:

$[CH_3OH]=0.190 M$

The expression of an equilibrium constant is given by :

$K_c=\frac{[CH_3OH]}{[CO][H_2]^2}$

$K_c=\frac{0.190 M}{0.115 M\times (0.116 M)^2}$

$K_c=122.78 \approx 123$

123 is the equilibrium constant for the reaction.

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A sample of gasoline has a mass of 595.0 lb and a volume of 14.0 ft^3. What is its specific gravity?

Sedbober [7]

Explanation:

The given data is as follows.

mass of gasoline = 595.0 lb

volume of gasoline = $14.0 ft^{3}$

As it is known that density is the amount of mass of a substance divided by its volume.

So, density of gasoline will be as follows.

Density = $\frac{mass}{volume}$

= $\frac{595.0 lb}{14.0 ft^{3}}$

= 42.5 $lb/ft^{3}$

As, 1 lb = 0.4536 kg and 1 ft = 0.3048 m. Now, putting these values into the above equation (1) as follows.

Density = 42.5 $lb/ft^{3}$

= $42.5 \times \frac{0.4536 kg}{(0.3048 m)^{3}}$

= 680.792 $kg/m^{3}$

= 680.8 $kg/m^{3}$ (approx)

Density of water is 1000 $kg/m^{3}$ . To measure specific gravity of gasoline, the formula will be as follows.

specific gravity of gasoline = $\frac{\text{density of gasoline}}{\text{density of water}}$

= $\frac{680.8 kg/m^{3}}{1000 kg/m^{3}}$

= 0.681

Thus, we can conclude that the specific gravity of gasoline is 0.681.

4 0

4 years ago

Solutions of hydrogen in palladium may be formed by exposing Pd metal to H gas. The concentration of hydrogen in the palladium d

Juliette [100K]

Explanation:

Mass of solution , m= 0.94 g + 215 g = 215.94 g

Volume of the solution = V

Density of solution = d = $10.8 g/cm^3$

$V=\frac{m}{d}=\frac{215.94 g}{10.8 g/cm^3}=19.99 cm^3=19.99 mL$

$1 cm^3=1 mL$

$1 mL=0.001 L$

$V=0.01999 L$

Moles of hydrogen = $\frac{0.94 g}{2 g/mol}=0.47 mol$

Molarity of hydrogen gas:

$Molarity=\frac{Moles}{\text{Volume of solution (L)}}$

$=\frac{0.47 mol}{0.01999 L}=0.02351 mol/L$

Molality of hydrogen gas :

Mass of solvent or here it is palladium = 215 g =0.215 kg (1 g = 0.001 kg)

$Molality=\frac{Moles}{\text{Mass of solvent(kg)}}$

$=\frac{0.47}{0.215 kg}=2.1860 mol/kg$

Mass percentage of hydrogen is solution :

$\frac{\text{Mass of hydrogen}}{\text{Mass of solution}}\times 100$

$=\frac{0.94 g}{215.94 g}\times 100=0.435\%$

5 0

4 years ago

Which contribution added to rutherfords discovery of a positive nucleus atoms are invisible electrons are scattered in an atom n

dedylja [7]

Answer:

neutrons are inside the nucleus

Explanation:

The most significant contribution that added to Rutherford's discovery of a positive nucleus is that neutrons are also inside the nucleus.

The discovery of neutrons as a nuclear particle was instrumental to Rutherford's discovery.
Since during his experiment, the alpha particles were deflected partly, he suggested a massive nucleus made up of just protons.
With the discovery of the neutron, the mass of the nucleus was enough to cause the deflection.

5 0

3 years ago

Which of the following would occur in the liver when glucose levels are high (think insulin is elevated)?

love history [14]

Answer:

Option (C).

Explanation:

Insulin and glucagon are the important hormone that regulates the blood glucose level. The improper functioning of insulin can cause the diabetes in the individual organism.

The elevated level of insulin in blood causes the Generation of glucose 1-phosphate to maintain the blood glucose level. The glycogen synthesis is also used to bring down the blood glucose level to the normal level.

Thus, the correct answer is option (C).

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4 years ago

List four metric prefixes and list what they stand for ( what they mean )

balandron [24]

A kilogram is 1,000 times larger than one gram (so 1 kilogram = 1,000 grams).
A centimeter is 100 times smaller than one meter (so 1 meter = 100 centimeters).
A dekaliter is 10 times larger than one liter (so 1 dekaliter = 10 liters)
A meter gram liter is the base unit

so. kilo-, centi, deka-, and meter grams and liters

8 0

4 years ago