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2 years ago

Which statement is correct?The enthalpy of the reaction is –184.6 kJ, and the reaction is exothermic.

Mathematics

2 answers:

Sav [38]2 years ago

8 0

Answer:

wich one is it???

Step-by-step explanation:

mafiozo [28]2 years ago

6 0

Answer:

The correct statements are :

1. The enthalpy of the reaction is -184.6 kJ, and the reaction is exothermic.

2. The enthalpy of the reaction is 184.6 kJ and the reaction is endothermic.

Step-by-step explanation:

Enthalpy of reaction is amount of heat absorbed or released during the reaction.

If energy is required, enthalpy of reaction is positive and if energy is released the enthalpy of reaction is negative.

Exothermic reaction: The chemical change is accompanied by the release of heat energy

Endothermic reaction: The chemical change is accompanied by the absorption of heat energy.

So, from the above definitions, it is clear that the enthalpy of reaction of a exothermic reaction is negative and that of a endothermic reaction is positive.

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olchik [2.2K]

D because the shaded region has one side and subtract by pie and substitute to get this answer.

7 0

2 years ago

If f x equals x -3 + g x equals 1 - x 2 - 9 find ( f og) (x and give any restrictions on its domain

evablogger [386]

$\begin{gathered} f(x)=x-3 \\ g(x)=\frac{1}{x^2-9} \\ (\text{fog)(x)}=\frac{1}{x^2-9}-3 \end{gathered}$

the denominator cannot be zero, because the division by zero is not defined, therefore:

$\begin{gathered} x^2-9=0 \\ \text{Solving for x:} \\ x^2=9 \\ \sqrt[]{x^2}=\sqrt[]{9} \\ x=\pm3 \end{gathered}$

Therefore the domain of (f o g)(x) is:

$D\colon(-\infty,-3)\cup(-3,3)\cup(3,\infty)$

3 0

8 months ago

Morgan begins biking south to the park at 20mph at noon. Corona leaves from the same point 15 min (.25hr) later to catch her. Ho

garri49 [273]

Answer:

X = 1h15mins

Step-by-step explanation:

Rate Time Distance

Morgan 20 X 20X

Corona 25 X – ¼ 25(X – ¼)

If they meet each other, they need to travle the same distance, mean :

20X = 25(X – ¼)

X = 1.25

1 hour and 15 minutes

6 0

3 years ago

Chet started to slow his eating speed down later in the evening. He was

ozzi

Answer:

The unit rate is:

1/8 turkey/per hour.

Step-by-step explanation:

As Chet was eating 1/4 of a turkey every 2 hours.

This tells us that every two hours, Chet will eat 175 1/4 of a turkey.

Unit rate basically means 'how much of something per 1 unit of something else'.

A unit rate is a rate with a denominator of 1 unit.

This means, in 1 hour, Chet will eat half of what he eats every 2 hours.

so Chet will eat $\frac{\frac{1}{4}}{2}=\frac{1}{8}$ of a turkey in 1 hour.

i.e.

$\frac{\frac{1}{4}}{2}=\frac{1}{8}$

Therefore, the unit rate is:

1/8 turkey/per hour.

6 0

2 years ago

The difference of 2 and c

daser333 [38]

Well, difference means subtractions so we need to subtract 2 and c

2-c

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2 years ago