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3 years ago

Which of the following could be the rate equation for a first order reaction? please help this is timed

Chemistry

1 answer:

wel3 years ago

7 0

Rate = k[A] = first order reaction

<h3>Further explanation</h3>

Given

Rate law

Required

A first-order reaction

Solution

The rate law : equation for the rate of chemical reaction

For reaction

aA + bB ⇒ C

The rate : r = k[A]ᵃ[B]ᵇ

The sum of exponents(a+b) is the reaction order

From the choice :

a. a+b = 2, second order reaction

b. a+b = 3, third order reaction

c. a+b = 4, fourth order reaction

d a+0 = 1, first order reaction

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Please help me with b and c.

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Answer:

c.sf4 b.2

Explanation:

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3 years ago

A piece of chocolate with a mass of 8 grams melts. What is the mass of the melted chocolate?

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Answer:

The mass of the melted chocolate is 8 grams.

Explanation:

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3 years ago

A common demonstration in chemistry courses involves adding a tiny speck of manganese(IV) oxide to a concentrated hydrogen perox

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Answer:

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3 years ago

What Newton’s law is this a example of:

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Newton's third law

Explanation:

every action has an equal and opposite reaction.

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3 years ago

Read 2 more answers

A mass of 100.0 g of solute is dissolved in water so that 850. mL of a 0.7500 M solution has been prepared. What is the molar ma

zmey [24]

Answer:

156.86 g / mol

Explanation:

We start from the molarity law

Cm = n / V

n = w / M

then

Cm = (w / M) / V

Cm = w / (M × V)

where:

Cm is the molarity

n number of moles

w a mass of the solute

M is the molar mass of the solute (which is needed)

V the volume of the solution in liters

Then the M can be calculated as following:

M = w / (Cm × V)

M = 100 / (0.75 × 0.85) = 156.86 g / mol

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4 years ago