All categories

4 years ago

Which of the following equations can be used to determine the change in enthalpy of a system?

Chemistry

1 answer:

seraphim [82]4 years ago

5 0

The answer for Plato will be letter A

You might be interested in

Of the three main states of matter, only gases can be compressed significantly.

rusak2 [61]

False! The three states of matter are solid, liquid, and gas. We can not touch gas, so it can not be compressed.

8 0

3 years ago

I need an answer ASAP pls

ivanzaharov [21]

Answer:

D. all of the above

Explanation:

I just know..

4 0

4 years ago

Draw the Lewis structures for CH3OH, CH2O and HCOOH. Indicate the hybrid orbital used in the sigma bonds for each of the carbon

sdas [7]

Answer:

See figure 1

Explanation:

For this question, we have to remember that in the lewis structures all atoms must have 8 electrons. And each atom would have a different value of valence electrons:

Carbon => 4

Oxygen=> 6

Hydrogen=> 1

Additionally, for the hybridizations we have to remember that:

$Sp^3$ => 4 single bonds

$Sp^2$ => 1 double bond

$Sp^1$ => 1 double bond

With this in mind, the formaldehyde and formic acid would have $Sp^2$ carbons and the ethanol an $Sp^3$ carbon.

Finally, for the oxidation state. We have to remember that if we have more bonds with oxygen, we will have more oxidation. Therefore, the carbon that has more oxidation is the one in the formic acid (we have several bonds with oxygen).

See figure 1

I hope it helps!

4 0

3 years ago

If a material contains three elements joined in a fixed proportion, what is it called?

jonny [76]

Pretty sure it's a Compound :)

3 0

4 years ago

In a short paragraph, explain one thing you've learned from the course this year.

exis [7]

Answer:

ive learned about the chart , ive learned about the coolest chemicle reactions and how. the can change colors , ive also learned that chenistrey is all around us since the beginning of life ,and how liquid can turn solid

Explanation:

7 0

3 years ago