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2 years ago

State two methods to increase the rate of the chemical reaction and explain

Chemistry

1 answer:

Jet001 [13]2 years ago

3 0

Answer:

METHOD 1: (surface area of a solid reactant) METHOD 2: (concentration or pressure of a reactant)

Explanation:

METHOD 1: (surface area of a solid reactant) Increasing the surface area of a solid reactant exposes more of its particles to attack. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.

METHOD 2: (concentration or pressure of a reactant) Increasing the concentration means that we have more particles in the same volume of solution. This increases the chance of collisions between reactant particles, resulting in more collisions in any given time and a faster reaction. As we increase the pressure of reacting gases, we increase the rate of reaction.

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The half life for the first order conversion of A to B is 56.6 hours. How long does it take for the concentration of A to decrea

sveta [45]

Answer:

It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

Explanation:

A → B

Initial concentration of the reactant = x

Final concentration of reactant = 10% of x = 0.1 x

Time taken by the sample, t = ?

Formula used :

$A=A_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}$

where,

$A_o$ = initial concentration of reactant

A = concentration of reactant left after the time, (t)

$t_{\frac{1}{2}}$ = half life of the first order conversion = 56.6 hour

$\lambda$ = rate constant

$A=A_o\times e^{-(\frac{0.693}{t_{1/2}})\times t}$

Now put all the given values in this formula, we get

$0.1x=x\times e^{-(\frac{0.693}{56.6 hour})\times t}$

t = 188.06 hour

It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

4 0

2 years ago

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photoshop1234 [79]

Number 4 is
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3 years ago

Read 2 more answers

How long would it take for 1.50 mol of water at 100.0 âc to be converted completely into steam if heat were added at a constant

defon

To convert boiling water to steam, that would involve heat of vaporization. The heat of vaporization for water at atmospheric conditions is: ΔHvap = 2260 J/g.

Molar mass of water = 18 g/mol

Q = mΔHvap = (1.50 mol water)(18 g/mol)(2260 J/g) = 61,020 J

Time = Q/Rate = (61,020 J)(1 s/20 J) = 3051 seconds

In order to express the answer in three significant units, let's convert that to minutes.
Time = 3051 s * 1min/30 s = 102 min

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2 years ago

Irrigation is a method used to water farm land. Identify two effects irrigation has on the water cycle and environment. A Irriga

sergiy2304 [10]

Answer:

A and C

Explanation:

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2 years ago

A 1.20 gram sample of a hydrated salt is heated to a constant mass of .80 gram. what is the percent of mass of water contained i

Papessa [141]

The mass of the water is 1.20 - 0.80 = 0.40 grams.

The % of water is (0.40 / 1.20 ) * 100 = 33 1/3%