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3 years ago

Chemistry question! Please help!

Chemistry

2 answers:

Illusion [34]3 years ago

7 0

When a solid (solute) comes in contact with the liquid (solvent), the solute goes about C) dissolution, in which the solid dissolves into the liquid.

ANEK [815]3 years ago

5 0

As this is with regards to solute and solvent, the solid will eventually dissolve in the liquid. The answer is C. dissolution.

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Can someone please please help me out ?

GarryVolchara [31]

Answer:

4.823 x 10^-19 J

Explanation:

Energy is calculated by E = hv where h - Planck's constant in joule.s

v - frequency.

in this particular question the wave length is 4.12 x 10^-7 m. to exhaustively use this we need a relation between wave length & frequency. c=wv where C is approximately 3 x 10^8m/s

-v = c/w = 3x10^8m/s / 4.12 x 10^-7m = 7.28 x 10^14 Hz or 1/sec

now we can simply use Planck's constant in E=hv =

(6.626 x 10^-34) x (7.28 x 10^14Hz) = 4.823 x 10^-19 J.

6 0

2 years ago

Rate law equation The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction betwe

jekas [21]

<u>Answer:</u> The reaction order with respect to A is 'm'

<u>Explanation:</u>

Order of the reaction is the sum of the concentration of terms on which the rate of the reaction actually depends. It is equal to the sum of the exponents of the molar concentration in the rate law expression.

Elementary reactions the reactions for which the order of the reaction is same as its molecularity and order with respect to each reactant is equal to its stoichiometric coefficient as represented in the balanced chemical equation.

The given chemical equation follows:

$aA+bB\rightleftharpoons cC+dD$

The rate of the above reaction is given to us as:

$Rate=k[A]^m[B]^n$

In the above rate law expression, the order with respect to the reactants is not equal to the stoichiometric coefficients. Thus, it is not an elementary reaction.

Order with respect to reactant A = m

Order with respect to reactant B = n

Hence, the reaction order with respect to A is 'm'

8 0

3 years ago

Iron is used to make steel for building bridges. Some bridges have blocks of magnesium attached to them. Explain why?

Ede4ka [16]

Blocks of magnesium is used to prevent iron corrosion.
This way of prevention is called sacrificial protection.

6 0

3 years ago

Which of the following most likely causes the rate of a chemical reaction to increase?

satela [25.4K]

Answer:

Where is the following

3 0

2 years ago

As you move from N to Bi, the metallic properties of the element

inysia [295]

Answer:

b. decreases

Explanation:

i just took a test on it

3 0

3 years ago