4 years ago

The shape of a molecule is determined by???

Chemistry

1 answer:

a_sh-v [17]4 years ago

4 0

Answer:

The shape of a molecule is deteremined by

Explanation:

The location of the nuclei and electrons.

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Acetylsalicylic acid (aspirin), HC9H7O4, is the most widely used pain reliever and fever reducer. Find the pH of 0.035 M aqueous

KatRina [158]

The pH of 0.035 M aqueous aspirin is 2.48

Explanation:

We are given:

Concentration of aspirin = 0.035 M

The chemical equation for the dissociation of aspirin (acetylsalicylic acid) follows:

$HC_9H_7O_4\rightleftharpoons H^++C_9H_7O_4^-$

Initial: 0.035

At eqllm: 0.035-x x x

The expression of $K_a$ for above equation follows:

$K_a=\frac{[C_9H_7O_4^-][H^+]}{[HC_9H_7O_4]}$

We are given:

$K_a=3.6\times 10^{-4}$

Putting values in above expression, we get:

$3.6\times 10^{-4}=\frac{x\times x}{(0.035-x)}\\\\x=-0.0037,0.0033$

Neglecting the value of x = -0.0037 because concentration cannot be negative

So, concentration of $H^+$ = x = 0.0033 M

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

$H^+$ = 0.0033 M

Putting values in above equation, we get:

$pH=-\log(0.0033)\\\\pH=2.48$

Hence, the pH of 0.035 M aqueous aspirin is 2.48

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3 years ago

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Rashid [163]

Answer:

the sexual reproduction

Explanation:

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Which discovery is most directly related to careers in biology?

Nookie1986 [14]

Molecular and Microbiology

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one of the isotopes of sulfur is represented as sulfur -35 or S-35. what does the number 35 signify?

Temka [501]

35 is equal to it's mass number

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_H2SO4 + __ B(OH)3 = _ B2(SO4)3 + __ H2O

Nana76 [90]

Answer:

3H2SO4 + 2B(OH)3 -> B2(SO4)3 + 6H2O

Explanation:

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4 years ago