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3 years ago

The ka of acetic acid ch3co2h is 1.8 x10-5. what is the ph

1 answer:

6 0

You must know the concentration of the acetic acid. Suppose the concentration is 0.1 M. The solution is as follows:

CH₃COOH → CH₃COO⁻ + H⁺
I 0.1 0 0
C -x +x +x
E 0.1 - x x x

Ka = (x)(x)/(0.1 - x)
1.8×10⁻⁵ = x²/(0.1 - x)
Solving for x,
x = 1.333×10⁻³ = H⁺

pH = -log[H⁺] = -log(1.333×10⁻³)
pH = 2.88

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Answer:

Magnesium dichloride

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2 years ago

Liquid does not act that a solid. how is it different from a solid and gas?

Wittaler [7]

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3 years ago

A public school district furnishes pencils to its elementary students. The pencils the secretary orders from the district wareho

IRINA_888 [86]

Minimum number of boxes order is 52.4 boxes.

Given that;

Average use of pencil per student = 9.3 pencil per year

Number of student in school = 812 students

Find:

Minimum number of boxes order

Computation:

Total number of pencil used in year = 812 × 9.3

Total number of pencil used in year = 7,551.6 pencils

12 dozen = 1 gross

So,

Number of pencils in 1 box = 12 × 12

Number of pencils in 1 box = 144 pencils

Minimum number of boxes order = 7551.6 / 144

Minimum number of boxes order = 52.4 boxes

Learn more:

brainly.com/question/3838477?referrer=searchResults

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2 years ago

You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilograms. How would you enter this number

mihalych1998 [28]

The mass of an electron can be expressed in the box as $\boxed{{m_e} = 9.1 \times {{10}^{ - 31}}{\text{ kg}}}$ .

Further explanation:

Atom is the smallest particle that can be present in any element. It is also known as the building unit of matter. Each atom has a central part that is known as the atomic nucleus. There are three subatomic particles that constitute the atom. These particles are protons, neutrons, and electrons. The atomic nucleus consists of protons and neutrons, both are collectively called nucleons. Electrons revolve around the nucleus of an atom in definite orbits.

Protons are positively charged subatomic particles, electrons are negatively charged and neutrons have no charge. Since electrons carry a unit negative charge, these create an electric field around them. These also participate in nuclear reactions. The mass of an electron $\left( {{m_e}} \right)$ is $9.1 \times {10^{ - 31}}{\text{ kg}}$ , that of protons is $1.6726219 \times {10^{ - 27}}{\text{ kg}}$ and that of neutrons is $1.674927471 \times {10^{ - 27}}{\text{ kg}}$ . The electrons are responsible for chemical properties of elements. The distribution and arrangement of electrons is used to predict whether the element will be inert or reactive.

Therefore the required answer is $\boxed{{m_e} = 9.1 \times {{10}^{ - 31}}{\text{ kg}}}$ .

Learn more:

Component of John Dalton’s atomic theory: brainly.com/question/2357175
Basis of investigation for the scientists: brainly.com/question/158048

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Atomic structure

Keywords: atom, matter, atomic nucleus, proton, electron, neutron, subatomic particle, nuclear reactions, electric field, reactive, inert.

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3 years ago

Why does The mass of an atom is not dependent on the number of electrons in an atom.

Minchanka [31]

Answer:

The mass of the atom, its atomic mass, depends upon the sum of the number of protons and the number of neutrons present in the nucleus. Since the properties of the electrons depend upon the number of protons in the nucleus of an atom, each different atomic number corresponds to a qualitatively different kind of atom.

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3 years ago

Read 2 more answers