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3 years ago

Self meditating to deal with stress

Chemistry

1 answer:

hjlf3 years ago

3 0

I think the answer is C but I also feel it should be A...... but I think its C

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When 10.0 grams of sulfur reacts with fluorine gas at a pressure of 2.69 atmosphere in a 5.00 L container at 0.00 degrees Celsiu

Gwar [14]

Answer:

74.1%

Explanation:

Based on the reaction:

S₈ + 16F₂ → 8SF₄

1 mole of sulfur reacts with 16 moles of F₂ to produce 8 moles of SF₄

To solve this question we must find the moles of each reactant in order to find the moles of SF₄. Thus, we can find the theoretical mass produced. Percent yield is:

Percent yield = Actual yield (25.0g) / Theoretical yield * 100

Moles S₈: 256.52g/mol

10.0g * (1mol / 256.52g) = 0.0390 moles

Moles F₂:

PV = nRT

PV/RT = n

Where P is pressure in atm, V is volume in liters, R is gas constant and T is absolute temperature (0°C = 273.15K)

2.69atm*5.00L / 0.082atmL/molK*273.15K = n

0.600 moles = n

For a complete reaction of 0.600 moles F₂ are required:

0.600mol F₂ * (1mol S₈ / 8 mol F₂) = 0.075 moles S₈

As there are just 0.0390 moles, S₈ is limiting reactant.

The theoretical moles and mass of SF₄ -Molar mass: 108.07g/mol- is:

0.0390 moles S₈ * (8mol SF₄ / 1mol S₈) = 0.312 moles SF₄ * (108.07g) =

33.7g

Percent yield = 25.0g / 33.7g * 100

= 74.1%

6 0

3 years ago

Tom pushes on a 50-kilogram box with a force of 25 newtons. Assuming the surface on which the box moves is frictionless, at what

zhannawk [14.2K]

Assuming the surface on which the box moves is frictionless, the rate at which the box accelerate is equal to 0.5 $m/s^2$ .

Given the following data:

Mass of box = 50 kilogram

Force = 25 newtons.

To determine the rate at which the box accelerate, assuming the surface on which the box moves is frictionless:

Mathematically, Newton's Second Law of Motion is given by the formula;

$Force = mass \times acceleration$

Making acceleration the subject of formula, we have:

$Acceleration =\frac{Force}{mass}$

Substituting the given parameters into the formula, we have;

$Acceleration = \frac{25}{50}$

Acceleration = 0.5 $m/s^2$

Read more on Newton's Law of Motion here: brainly.com/question/1121817

3 0

2 years ago

How to find molecular weight

Nastasia [14]

Answer:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Explanation:

hope this helped

3 0

3 years ago

1.which of the following correctly describes carbon, represented by c?

Gnoma [55]

1 is an element, 2 is an compound

8 0

3 years ago

How are mass and weight alike?

joja [24]

Both mass and weight are measured by using scales.

7 0

3 years ago