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PIT_PIT [208]
3 years ago
13

What data should be plotted to show that experimental concentration data fits a first-order reaction? A) 1/[reactant] vs. time B

) [reactant) vs. time C) In[reactant] vs. time D) In(k) vs. 1/1
Chemistry
1 answer:
natita [175]3 years ago
7 0

Answer:

C) In[reactant] vs. time

Explanation:

For a first order reaction the integrated rate law equation is:

A = A_{0}e^{-kt}

where A(0) = initial concentration of the reactant

A = concentration after time 't'

k = rate constant

Taking ln on both sides gives:

ln[A] = ln[A]_{0}-kt

Therefore a plot of ln[A] vs t should give a straight line with a slope = -k

Hence, ln[reactant] vs time should be plotted for a first order reaction.

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Which type of substance is made of only one kind of matter and has definite properties?
aivan3 [116]

A pure chemical substance

Explanation:

A pure substance is any substance made up of only one kind of matter and has definite properties.

Matter is anything that has weight and occupies space

On a broad basis, matter can be categorized as pure or distinct substances and impure substances or mixtures.

Pure substances have the following properties;

  • All parts of a pure substance remains the same throughout i.e homogeneous.
  • Their composition is definite
  • They cannot easily be broken or separated down into simpler substances by physical means.

They have a unique set of chemical properties.

Pure substances are elements and compounds.

learn more:

Heterogeneous mixtures brainly.com/question/1446244

#learnwithBrainly

3 0
2 years ago
Which is the most important question for deciding if a chemical reaction has occurred
cluponka [151]
A chemical reaction undergoes a chemical change so the question you should ask if a chemical reaction has occurred is "Did a chemical change happened?". Chemical change in a reaction happens when you see bubbles, when the reaction increases or decreases in temperature or a precipitate is formed.
6 0
3 years ago
Read 2 more answers
Which scientific tools are used by life scientists
Zolol [24]
Microscopes, balances,scales
8 0
2 years ago
Is decay pool or flux
mash [69]

Answer:

A single carbon pool can often have several fluxes both adding and removing carbon simultaneously. For example, the atmosphere has inflows from decomposition (CO2 released by the breakdown of organic matter), forest fires and fossil fuel combustion and outflows from plant growth and uptake by the oceans.

Explanation:

7 0
1 year ago
A solution containing CaCl2 is mixed with a solution of Li2C2O4 to form a solution that is 3.5 × 10-4 M in calcium ion and 2.33
Burka [1]

Answer:

B. A precipitate will form since Q > Ksp for calcium oxalate

Explanation:

Ksp of CaC₂O₄ is:

CaC₂O₄(s) ⇄ Ca²⁺ + C₂O₄²⁻

Where Ksp is defined as the product of concentrations of Ca²⁺ and C₂O₄²⁻ in equilibrium:

Ksp = [Ca²⁺][C₂O₄²⁻] = 2.27x10⁻⁹

In the solution, the concentration of calcium ion is 3.5x10⁻⁴M and concentration of oxalate ion is 2.33x10⁻⁴M.

Replacing in Ksp formula:

[3.5x10⁻⁴M][2.33x10⁻⁴M] = 8.155x10⁻⁸. This value is reaction quotient, Q.

If Q is higher than Ksp, the ions will produce the precipitate CaC₂O₄ until [Ca²⁺][C₂O₄²⁻] = Ksp.

Thus, right answer is:

<em>B. A precipitate will form since Q > Ksp for calcium oxalate</em>

<em></em>

4 0
3 years ago
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