Identify the factors that govern the speed and direction of a reaction. Check all that apply.

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_c$ .

The given balanced equilibrium reaction is,

$C_3H_6O(g)+4O_2(g)\rightleftharpoons 3CO_2(g)+3H_2O(g)$

At eqm. conc. (0.51) M (0.30) M (1.8) M (2.0)M

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[CO_2]^3\times [H_2O]^3}{[O_2]^4\times [C_3H_6O]^1}$

Now put all the given values in this expression, we get :

$K_c=\frac{(1.8)^3\times (2.0)^3}{(0.30)^4\times (0.51)^1}$

$K_c=1.1\times 10^4$

Thus the value of the equilibrium constant is $1.1\times 10^4$

3 0

3 years ago

EXPERIMENT: USING THE TYNDALL EFFECT TO IDENTIFY COLLOIDS

ELEN [110]

<span>What did you observe?

When the mixture of Jell-O is shined with the light you observe that the mixture becomes opaque or misty.

In the other two glasses the mixture remains clear

The Jell-O mixture dispereses the light while the other two glasses let the light pass through them.

What is the Tyndall effect?

The Tyndall effect is the dispersion of light by colloid particles. This happens becasue colloid particles present in the mixture are bigger than solvated particles.

Colloid particles are so small that they cannot be in the mixture, but are big enough to disperse the light.

Which glass displayed the Tyndall effect?

The glass with the Jell-O displayed the Tyndall effect.

What does that tell you about the substance in the glass?

The mixture of this glass is a colloid, because they are the only mixtures that may look clear but becomes misty when the light passes trhough them.

Which glass represents a pure substance?

Only the glass with pure water represents a pure substance, one of the glasses that did not disperse the light.

Which glass represents a solution?

The other glass that did not disperse the light is a solution.

Pure substances and solutions do not disperese water. Diluted coloids look clear but disperse light.
</span>

5 0

4 years ago

Read 2 more answers

a nurse practitioner orders Medrol to be given 1.5 mg/kg of body weight. if a child weighs 72.6lb and the available stock of Med

Harrizon [31]

Answer is: 2,469 mL give to the child.
The mass m in kilograms (kg) is equal to the mass m in pounds (lb) times 0,45359237: m(child) = 72,6 · 0,045359237 = 32,93 kg.
m(Medrol) = 32,93 kg · 1,5 mg/kg.
m(Medrol) = 49,39 mg.
d(Medrol) = 20,0 mg/mL.
V(Medrol) = m(Medrol) ÷ d(Medrol).
V(Medrol) = 49,39 mg ÷ 20 mg/mL.
V(Medrol) = 2,469 mL.

8 0

3 years ago