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slega [8]
3 years ago
10

The atomic mass of a atom (in amu) is equal to

Chemistry
2 answers:
kobusy [5.1K]3 years ago
5 0
1.67377x10-27 kilogram(kg) or 1.67377x 10-24 gram(g)
kotykmax [81]3 years ago
3 0

Answer:

the sum of the number of protons and neutrons in the nucleus.

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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
Convert 25 gram of carbon dioxide to mold
Rus_ich [418]

The atomic weight of carbon dioxide is about 12.011 + 15.999 + 15.999 = 44.009.

44.009 grams of CO2 = 1 mole of CO2             CO2 = Carbon dioxide

25 ÷ 44.009 ≈ 0.568

About 0.568 moles of CO2

7 0
3 years ago
Which of the following statements is true?
Kazeer [188]
Only one: the nucleus of an atom is made up of protons and neutrons.
Why others are false:
Boiling point of a substance is not dependent on the volume because it’s a intensive property.
During sublimation, a solid changes directly into gas.
Electrons orbit the nucleus of an atom in circular orbits (kinda unsure of this one.)
3 0
3 years ago
Read 2 more answers
...........................................................
iVinArrow [24]

Answer:

When these materials end up in the ocean, they support the growth and well-being of marine life.

Explanation:

This is the incorrect statement

8 0
3 years ago
A rectangle has a width of 7 inches height of 14 inches and a length of 12 inches find it’s volume 
Nikolay [14]
The answer would be 1,176. you solve by using (L*H*W)
8 0
3 years ago
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