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bazaltina [42]
3 years ago
12

How is the electron configuration of an anion different from that of the corresponding neutral atom?how is the electron configur

ation of an anion different from that of the corresponding neutral atom?
Chemistry
1 answer:
irinina [24]3 years ago
6 0
The electronic configuration of an anion is more than that from that of the corresponding neutral atom.
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What is the pH of a 0.1 M phosphate buffer (pKa = 6.86) that contains equal amounts of acid and conjugate base?
Anvisha [2.4K]

Answer : The pH of a 0.1 M phosphate buffer is, 6.86

Explanation : Given,

pK_a=6.86

Concentration of acid = 0.1 M

Concentration of conjugate base (salt) = 0.1 M

Now we have to calculate the pH of buffer.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

Now put all the given values in this expression, we get:

pH=6.86+\log (\frac{0.1}{0.1})

pH=6.86

Therefore, the pH of a 0.1 M phosphate buffer is, 6.86

4 0
3 years ago
Balance this equation
laila [671]

Answer:

4HCl  +  SiO2 → 4H2O  +  SiCl4

axit clohidric  Silic dioxit  nước  Silic tetraclorua

Axit      

Explanation:

5 0
3 years ago
Read 2 more answers
Methane is a type of coal.<br> true or false
Karolina [17]
The answer is false methane is emitted from coal
3 0
3 years ago
A fossil was analyzed and determined to have a carbon-14 level that is 70 % that of living organisms. The half-life of C-14 is 5
Citrus2011 [14]

Answer: 2948

Explanation:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.69}{t_{\frac{1}{2}}}=\frac{0.693}{5730}=1.21\times 10^{-4}years^{-1}

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 1.21\times 10^{-4}years^{-1}

t = age of sample  = ?

a = let initial amount of the reactant  = 100

a - x = amount left after decay process = \frac{70}{100}\times 100=70

t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{70}

t=2948years

Thus the fossil is 2948 years old.

5 0
3 years ago
Consider the electrolysis of molten barium chloride (bacl2). write the half-reactions. include the states of each species.
aksik [14]
Molten barium chloride is separeted into two species :
BaCl₂(l) → Ba(l) + Cl₂(g),
but first ionic bonds in this salt are separeted because of heat:
BaCl₂(l) → Ba²⁺(l) + 2Cl⁻(l).

Reaction of reduction at cathode(-): Ba²⁺(l) + 2e⁻ → Ba(l).

Reaction of oxidation at anode(+): 2Cl⁻(l) → Cl₂(g) + 2e⁻.

<span>The anode is positive and the cathode is negative.</span>

7 0
3 years ago
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