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3 years ago

Use kinetic molecular theory to explain why a gas takes the shape and volume of its container

Chemistry

1 answer:

Tamiku [17]3 years ago

7 0

Answer:

Imo : Gas particles are in constant, random motion. The volume of gas particles is negligible in comparison to the volume of the container. There are no attractive forces between gas particles.

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In terms of bonds, what would the molecule C₆H₁₂ be classified as?

Colt1911 [192]

Answer:

Alkene

Explanation:

5 0

3 years ago

why is it necessary to adjust the height of the graduated cylinder when measuring the volume of co2 (g) produced? group of answe

Elanso [62]

3. The height of the graduated cylinder when measuring the volume of co2 (g) produced is adjusted to equalize the pressure in the graduated cylinder with the atmospheric pressure.

We discovered that when the water level within the graduated cylinder is higher than the water level outside, the gases inside the graduated cylinder have a lower pressure than the atmospheric pressure. It would then be possible to equalize pressure by changing the graduated cylinder's water level to match the water level outside.

Therefore last option or 3rd option is the correct choice.

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1 year ago

Acetone has a boiling point of 56.5 celcius. How many grams of the acetone vapor would occupy the 250 mL Erlenmeyer flask at 57

vodomira [7]

Answer:

0.515 g

Explanation:

<em>Acetone (C₃H₆O) has a boiling point of 56.5 °C. How many grams of the acetone vapor would occupy the 250 mL Erlenmeyer flask at 57 °C and 730 mmHg?</em>

<em />

Step 1: Given data

Temperature (T): 57°C

Pressure (P): 730 mmHg

Volume (V): 250 mL

Step 2: Convert "T" to Kelvin

We will use the following expression.

K = °C + 273.15 = 57°C + 273.15 = 330 K

Step 3: Convert "P" to atm

We will use the conversion factor 1 atm = 760 mmHg.

730 mmHg × (1 atm/760 mmHg) = 0.961 atm

Step 4: Convert "V" to L

We will use the conversion factor 1 L = 1,000 mL.

250 mL × (1 L/1,000 mL) = 0.250 L

Step 5: Calculate the moles (n) of acetone

We will use the ideal gas equation.

P × V = n × R × T

n = P × V/R × T

n = 0.961 atm × 0.250 L/(0.0821 atm.L/mol.K) × 330 K

n = 8.87 × 10⁻³ mol

Step 6: Calculate the mass corresponding to 8.87 × 10⁻³ moles of acetone

The molar mass of acetone is 58.08 g/mol.

8.87 × 10⁻³ mol × 58.08 g/mol = 0.515 g

8 0

3 years ago

50 ml of 0. 100 m hcl is titrated with 0. 1500 m naoh. the ph at the equivalence point is:_____.

marysya [2.9K]

The answer is 7.

The equivalence point of a titration is when moles of titrant added becomes equal to the moles of sample analyte.

Calculate the pH at equivalence point for a strong acid and strong base reaction.

The given acid is HCl which is a strong acid and the base NaOH is also a strong base.
Calculate the moles of acid HCl:

Molarity of $HCl$ = 0.100 M

Volume of $HCl$ = 50 mL = 0.050 L

$Moles\ of\ HCl\ = Molarity\ of\ HCl$ × $Volume\ of\ HCl\ in\ L$

$= 0.100\ M$ × $0.050\ L = 0.005\ moles$

At equivalence point, same moles of base are added and thus it results into complete neutralization. Thus, all the hydrogen ions of acid are neutralized by the hydroxide ions of the base forming only water and neutral salt.
Thus, the pH at the equivalence point becomes 7 (neutral solution).

To learn more about pH at equivalence point visit:

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2 years ago

Consider this reaction and its rate law.

slava [35]

Answer:

(a) 1

(b) 2

Explanation:

According to the law of mass action:-

The rate of the reaction is directly proportional to the active concentration of the reactant which each are raised to the experimentally determined coefficients which are known as orders. The rate is determined by the slowest step in the reaction mechanics.

Order of in the mass action law is the coefficient which is raised to the active concentration of the reactants. It is experimentally determined and can be zero, positive negative or fractional.

The order of the whole reaction is the sum of the order of each reactant which is raised to its power in the rate law.

Thus,

Given that:-

Thus, the rate law is as follows:-

$r=k[A][B]^2$

(a) The order w.r.t. to A is 1

(b) The order w.r.t. to B is 2

7 0

3 years ago