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vichka [17]
3 years ago
9

Which equation correctly relates the heat of reaction to the standard heats of formation?

Chemistry
1 answer:
VARVARA [1.3K]3 years ago
4 0

Answer:

D

Explanation:

∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)

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What is the main exception in the atomic radius? Explain.
yarga [219]

Answer:

The atomic radius of atoms generally decreases from left to right across a period. There are some small exceptions, such as the oxygen radius being slightly greater than the nitrogen radius. Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level.

hope this helps!

7 0
3 years ago
What chemical compound is crucial to marine life and how is it disappearing?
daser333 [38]
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3 years ago
Draw a lewis structure for ketene, c2h2o, which has a carbon–carbon double bond
MrMuchimi

Visual representation of covalent bonding indicating the valence shell electrons in the molecule, lines represents the shared pair of electron and pair of electrons that are not involved in bonding are represented as dots(lone pairs) are known as Lewis structures.

Compound formation takes place in order to complete the octet of each element that is according to octet rule, each atom forms bond with other atom in order to complete their octet that is to get eight electrons in its valence shell and attain stability.

An organic compound of the form R^{'}R^{''}C=C=O is known as ketene.

The given ketene is C_2H_2O.

The number of valence electron of:

C = 4

H = 1

O = 6

The number of valence electrons in C_2H_2O = 2\times 4+2\times 1+1\times 6 =16

2 electrons are involved in each single bond between carbon and hydrogen and 4 electrons are involved in each double bond formed between carbon-carbon and carbon-oxygen. Hence, the total number of electrons involved in bond formation are 12 and rest 2 pair of electrons are present on oxygen as lone pair of electrons.

Therefore, the attached image is the Lewis structure of C_2H_2O .

8 0
3 years ago
Electrochemistry might be considered a subspecialty of which of the following areas of chemistry
riadik2000 [5.3K]
Hey there!

<span> Electrochemistry might be considered a subspecialty of which of the following areas of chemistry?

Answer: </span>
<span>D. Organic chemistry

Hope this helps
Have a great day (:
</span>
3 0
3 years ago
What is the frequency of a radio wave with a a wavelength of 3 m? (Hint: MHz
Ostrovityanka [42]

Answer:
a. 1 x 10^8

Explanation:

100 MHz = 100,000,000 Hz = 10^8 Hz

4 0
2 years ago
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