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3 years ago

Which of the following can lower the activation energy of a system?

Chemistry

1 answer:

aleksandrvk [35]3 years ago

8 0

wrong boiiiiiiiiiiii

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For the reaction PCl5(g) + heat PCl3(g) + Cl2(g), what will happen when the temperature is decreased

vovikov84 [41]

There will be a shift towards the reactants

5 0

3 years ago

Read 2 more answers

Please help

inna [77]

From the calculation, the standard free energy of the system is -359kJ.

<h3>What is the standard free-energy?</h3>

The standard free-energy is the energy present in the system. We have to first obtain the cell potential using the formula;

Ereduction - E oxidation = 0.96 V - 0.34 V = 0.62 V

Using the formula;

ΔG = -nFEcell

ΔG =-(6 * 96500 * 0.62)

ΔG =-359kJ

Learn more about free energy:brainly.com/question/15319033

#SPJ1

3 0

1 year ago

A certain substance X has a normal freezing point of -6.4 C and a molal freezing point depression constant Kf= 3.96 degrees C.kg

Brut [27]

Answer: $1.0\times 10^2g$

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=(-6.4-(13.6))^0C=7.2^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte like urea)

$K_f$ = freezing point constant = $3.96^0C/m$

m= molality

$\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}}\times \text{weight of solvent in kg}}$

Weight of solvent (X)= 950 g = 0.95 kg

Molar mass of non electrolyte (urea) = 60.06 g/mol

Mass of non electrolyte (urea) added = ?

$7.2=1\times 3.96\times \frac{xg}{60.06 g/mol\times 0.95kg}$

$x=1.0\times 10^2g$

Thus $1.0\times 10^2g$ urea was dissolved.

8 0

3 years ago

Sound waves are mechanical waves in which the particles in the medium vibrate in a direction parallel to the direction of energy

Marat540 [252]

Longitudinal wave is the another name.

3 0

3 years ago

Which question cannot be answered by science?

Bumek [7]

Hi!

The question that science cannot answer is any question which is opinionated. It cannot have one true answer because it is simply subjective.

Other examples would be any question which cannot successfully follow the scientific method.

So, in the case of the question - the answer is going to be whichever question is <em>opinionated. </em>Just as a hint, not <em>everyone </em><em>thinks </em>endangered animals <em>should </em>be protected.

Hopefully, this helps! =)

5 0

3 years ago