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4 years ago

What are some ways you can divide these dogs into groups?

Chemistry

2 answers:

anygoal [31]4 years ago

5 0

Big dogs and short dogs, short hair and long hair, pointy ears and droopy ears

Papessa [141]4 years ago

5 0

By size

by fur

by ears

by wait average

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Electronic transitions (i.e., absorption of uv or visible light) of the conjugated molecule butadiene can be approximated using

dlinn [17]

Answer:

2.51 Angstroms

Explanation:

For a particle in a one dimensional box, the energy level, En, is given by the expression:

En = n²π² ħ² / 2ma²

where n is the energy level, ħ² is Planck constant divided into 2π, m is the mass of the electron ( 9.1 x 10⁻³¹ Kg ), and a is the length of the one dimensional box.

We can calculate the change in energy, ΔE, from n = 2 to n= 3 since we know the wavelength of the transition ( ΔE = h c/λ ) and then substitute this value for the expresion of the ΔE for a particle in a box and solve for the length a.

λ = 207 nm x 1 x 10⁻⁹ m/nm = 2.07 x 10⁻⁷ m ( SI units )

ΔE = 6.626 x 10⁻³⁴ J·s x 3 x 10⁸ m/s / 2.07 x 10⁻⁷ m

ΔE = 9.60 x 10⁻¹⁹ J

ΔE(2⇒3) = ( 3 - 2 ) x π² x ( 6.626 x 10⁻³⁴ J·s / 2π )² / ( 2 x 9.1 x 10⁻³¹ Kg x a² )

9.60 x 10⁻¹⁹ J = π² x( 6.626 x 10⁻³⁴ J·s / 2π )² / ( 2 x 9.1 x 10⁻³¹ Kg x a² )

⇒ a = 2.51 x 10⁻¹⁰ m

Converting to Angstroms:

a = 2.51 x 10⁻¹⁰ m x 1 x 10¹⁰ Angstrom / m = 2.51 Angstroms

6 0

4 years ago

Acetylating agents such as acetic anhydride react preferentially with primary amines, iodoacetate reacts preferentially with sul

nydimaria [60]

II think thihe answer is to be part of the acid to be honest

8 0

4 years ago

Help!

Bumek [7]

Answer:

Explanation:

Answer is B i got it right

8 0

3 years ago

Read 2 more answers

How many atoms are in each compound ?

noname [10]

Compounds are made of two or more atoms of different elements, such as water (H2O) and methane (CH4). Atoms are not drawn to scale. Molecules of compounds have atoms of two or more different elements.

7 0

3 years ago

A hazard is ________. An example of a hazard is ____.

Damm [24]

According to the research, a hazard is the real possibility that we will suffer some harm. An example of a hazard is free toxic gases.

<h3>What is a hazard?</h3>

It is associated with situations that have potentially harmful effects on the body, the environment or property.

In chemistry, it is understood as those conditions of potential health damage caused by uncontrolled exposure to chemical agents of various kinds, such as the release of toxic and flammable gases such as ethanol.

Therefore, we can conclude that according to the research, a hazard is the real possibility that we will suffer some harm. An example of a hazard is free toxic gases.

Learn more about a hazard here: brainly.com/question/13340017

#SPJ1

8 0

2 years ago