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kap26 [50]
2 years ago
11

A graduated cylinder contains 15.0 mL of water. When a metal solid is added to the cylinder the water level rises to 35.5 mL. Th

e metal solid is massed on a balance and its mass is found to be 154.32 g. What is the density of the metal?
Chemistry
1 answer:
vova2212 [387]2 years ago
4 0
There answer is 6.63 g/mL.
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A chemical equation is balanced when the
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a balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.

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liraira [26]

Answer:

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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]

<u> </u> The pH of 0.035 M aqueous aspirin is 2.48

<u>Explanation:</u>

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^-

<u>Initial:</u>         0.035

<u>At eqllm:</u>    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

7 0
3 years ago
Which state is true about the speed of heat transfer by conduction?
Thepotemich [5.8K]
I think the answer is, Thermal? I hope u get it right
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3 years ago
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