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Elanso [62]
3 years ago
8

The combining of hydrogen and oxygen gas into liquid water is an example of what kind of change?

Chemistry
1 answer:
KatRina [158]3 years ago
7 0
The combining of hydrogen and oxygen gas into liquid=H2O (water) is a compound or a molecule because it is 2 different elements combined with chemical bonds so its Chemical. B 
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Functional group and bond hybridization of vanillin
lana66690 [7]

Vanillin is the common name for 4-hydroxy-3-methoxy-benzaldehyde.

See attached figure for the structure.

Vanillin have 3 functional groups:

1) aldehyde group:  R-HC=O, in which the carbon is double bonded to oxygen

2) phenolic hydroxide group: R-OH, were the hydroxyl group is bounded to a carbon from the benzene ring

3) ether group: R-O-R, were hydrogen is bounded through sigma bonds to carbons

Now for the hybridization we have:

The carbon atoms involved in the benzene ring and the red carbon atom (from the aldehyde group) have a <u>sp²</u> hybridization because they are involved in double bonds.

The carbon atom from the methoxy group (R-O-CH₃) and the blue oxygen's have a  <u>sp³</u>  hybridization because they are involved only in single bonds.

7 0
3 years ago
What is the energy of a photon of red light that has a frequency of 4.48 X 10^14Hz?
lana [24]

Answer:

E = 29.7× 10⁻²⁰  j

Explanation:

Given data;

Frequency of light = 4.48 × 10¹⁴ Hz

Energy of photon = ?

Solution:

Formula:

E = h.f

E = energy of photon

h = planck's constant

f = frequency

E = h.f

E = 6.63 × 10⁻³⁴ Kg.m² /s × 4.48 × 10¹⁴ s⁻¹

E = 29.7× 10⁻²⁰ Kg.m²/s²

Kg.m²/s² = j

E = 29.7× 10⁻²⁰  j

3 0
3 years ago
What is the most abundant gas in Earth's present day atmosphere?
Anna007 [38]
Nitrogen. air consists 78% of nitrogen gas
4 0
3 years ago
Read 2 more answers
What is most likely to refract a beam of light ?
Lorico [155]

Answer:

change in speed

Explanation:

if a substance causes the light to speed up or slow down more, it will refract more.

3 0
3 years ago
(NH4)2CO3à NH3 + CO2 + H2O For this unbalanced chemical equation, what is the coefficient for carbon dioxide when the equation i
nasty-shy [4]

Answer:

The answer to your question is the letter A. 1

Explanation:

Data

Chemical reaction

                   (NH₄)₂CO₃  ⇒   NH₃  +  CO₂  + H₂O

               Reactants    Elements     Products

                      2            Nitrogen             1

                       1            Carbon                1

                       8           Hydrogen            5

                       3           Oxygen                3

This reaction is unbalanced

                   (NH₄)₂CO₃  ⇒   2NH₃  +  CO₂  + H₂O

               Reactants    Elements     Products

                      2            Nitrogen             2

                       1            Carbon                1

                       8           Hydrogen            8

                       3           Oxygen                3

Now, the reaction is balanced,

The coefficient for Carbon dioxide is 1

6 0
3 years ago
Read 2 more answers
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