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3 years ago

Which of the following identifies the number and location of protons in a lithium atom

Chemistry

1 answer:

bezimeni [28]3 years ago

6 0

The number of protons is the atomic number

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Choose the system to which this item belongs: stomach

hram777 [196]

Digestive. This also includes the intestines.

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3 years ago

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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?

Gelneren [198K]

Answer:

it shows that no atom have been gained or loosed in that reaction

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3 years ago

Water is considered neutral and has a pH of:

Brums [2.3K]

Answer:

Water has a pH of 7 - its not acid or base (its neutral {in the middle})

Explanation:

Since the pH scale maximum number is 14, the middle number - is 7 - which is where water is

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3 years ago

In the laboratory, a general chemistry student measured the pH of a 0.529 M aqueous solution of phenol (a weak acid), C6H5OH to

Artyom0805 [142]

Answer:

The dissociation constant of phenol from given information is $9.34\times 10^{-11}$ .

Explanation:

The measured pH of the solution = 5.153

$C_6H_5OH\rightarrow C_6H_5O^-+H^+$

Initially c

At eq'm c-x x x

The expression of dissociation constant is given as:

$K_a=\frac{[C_6H_5O^-][H^+]}{[C_6H_5OOH]}$

Concentration of phenoxide ions and hydrogen ions are equal to x.

$pH=-\log[x]$

$5.153=-\log[x]$

$x=7.03\times 10^{-6} M$

$K_a=\frac{x\times x}{(c-x)}=\frac{x^2}{(c-x)}=\frac{(7.03\times 10^{-6} M)^2}{ 0.529 M-7.03\times 10^{-6} M}$

$K_a=9.34\times 10^{-11}$

The dissociation constant of phenol from given information is $9.34\times 10^{-11}$ .

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4 years ago

What is a radical in chemistry

lidiya [134]

Radical, in chemistry, molecule that contains at least one unpaired electron. Most molecules contain even numbers of electrons, and the covalent chemical bonds holding the atoms together within a molecule normally consist of pairs of electrons jointly shared by the atoms linked by the bond.

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2 years ago