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Artyom0805 [142]
3 years ago
14

What is a substance that decreases the rate of a chemical reaction called?

Chemistry
2 answers:
trasher [3.6K]3 years ago
4 0

Answer: B. Inhibitor

Explanation:

The answer is inhibitor because a catalyst does the opposite and products/reactants are part of the chemical reaction.

hichkok12 [17]3 years ago
4 0

Answer:Inhibitor

Explanation:

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Which of the following is a measurement of an object's mass?
Brilliant_brown [7]

Answer:

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Explanation:

"millimetres" is a unit of measurement and is used for measuring distances.

"newton" is a unit of weight and is used to represent the weight of an object

:kilograms" is the one used for measuring mass

5 0
2 years ago
What concentration of benzoic acid will have a ph of 4.0? (for benzoic acid, pka=4.20)?
aalyn [17]
We are given the molar concentration of an aqueous solution of weak acid and the pH ofthe solution, and we are asked to determine the value of Ka for the acid.
The first step in solving any equilibrium problem is to write the equation for the equilibriumreaction. The ionization of benzoic acid can be written as seen in the attached image (1).
The equilibrium-constant expression is the equation number (2)
From the measured pH, we can calculate pH as seen in equation (3)
To determine the concentrations of the species involved in the equilibrium, we imagine that thesolution is initially 0.10 M in HCOOH molecules. We then consider the ionization of the acidinto H+ and HCOO-. For each HCOOH molecule that ionizes, one H+ ion and one HCOO- ionare produced in solution. Because the pH measurement indicates that [H+] = 1x 10^-4 M atequilibrium, we can construct the following table as seen in the equation number (4)
To find the value of Ka, please see equation (5):
We can now insert the equilibrium concentrations into the expression for Ka as seen in equation (6)
Therefore, 2.58x10^-4 M is the concentration of benzoic acid to have a pH of 4.0

7 0
3 years ago
Which would be isotopes?
otez555 [7]

Answer:

e

Explanation:

8 0
3 years ago
What is the percent yield of carbon dioxide of 2.5 mole of oxygen react and 32.4 g of carbon dioxide are produced?
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Explanation:

6 0
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