3 years ago

Which statement regarding the second law of thermodynamics is true?

1 answer:

4 0

The Second Law of Thermodynamics says that processes that involve the transfer or conversion of heat energy are irreversible. ... The First Law of Thermodynamics states that energy cannot be created or destroyed; the total quantity of energy in the universe stays the same.

You might be interested in

Liquids have a(n)____shape and A(n)_____volume.

shusha [124]

B. Indefinite, definite

4 0

3 years ago

Valeric acid, HC5H9O2 (Ka = 1.5 ✕ 10−5), is used in the manufacture of magnesium valerate, a nerve-calming agent. What is the hy

Studentka2010 [4]

Answer:

$[H^+]=0.00332M$

Explanation:

Hello,

In this case, considering the dissociation of valeric acid as:

$HC_5H_9O_2 \rightleftharpoons C_5H_9O_2 ^-+H^+$

Its corresponding law of mass action is:

$Ka=\frac{[H^+][C_5H_9O_2^-]}{[HC_5H_9O_2]}$

Now, by means of the change $x$ due to dissociation, it becomes:

$Ka=\frac{(x)(x)}{0.737-x}=1.5x10^{-5}$

Solving for $x$ we obtain:

$x=0.00332M$

Thus, since the concentration of hydronium equals $x$ , the answer is:

$[H^+]=x=0.00332M$

Best regards.

7 0

3 years ago

Calculate the mass percent composition of sulfur in Al2(SO4)3.

Anastaziya [24]

The molar mass of aluminum sulftae is 342.14 g/mol.

Since the subscript shows that there are 3 sulfurs within the substance, the total mass of sulfur is 96.21g/mol

Now take the mass of the sulfur and divide it by the molar mass of aluminum sulfate, then multiply by 100:
(96.21/342.15)(100) = 28.1% mass composition of sulfate

6 0

3 years ago

Plz help me... my ppr is gonig on......

anyanavicka [17]

Answer:

geruow0irghvn3p0unhie0ghik

Explanation:

3 0

3 years ago

Read 2 more answers

What happens to a river that’s is blocked from a landslide?

DanielleElmas [232]

Answer:

Explanation:

6 0

3 years ago