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OLga [1]
3 years ago
7

La TEMPERATURA es un cambio físico o Químico?

Chemistry
1 answer:
gladu [14]3 years ago
6 0
La temperatura es un cambio físico
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Which of the following is the BEST description of a budget? *<br> 10
Nonamiya [84]

Answer:

A budget is an estimation of revenue and expenses over a specified future period of time and is usually compiled and re-evaluated on a periodic basis. Budgets can be made for a person, a group of people, a business, a government, or just about anything else that makes and spends money.

4 0
3 years ago
How many atoms of carbon are present in 1.5 mole of carbon.
umka2103 [35]

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5 0
3 years ago
Fill in the blanks.
vichka [17]

Answer:

Hello There!!

Explanation:

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4 0
3 years ago
Read 2 more answers
What is the name of the molecule below
il63 [147K]

Answer:

2-octene

Explanation:

the 8-carbon chain (oct); has a double bond (ene) is on the 2nd carbon (2-)

4 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
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