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3 years ago

Infrared radiation has a longer wavelength, frequency, and energy than visible light.

2 answers:

5 0

Infrared radiation has a longer wavelength, HIGHER frequency and LOWER energy than visible light.
Hope this helps!!!!!!!

KATRIN_1 [288]3 years ago

4 0

Answer: The correct answer is lower, lower.

Explanation:

The relation between energy and wavelength of light is given by Planck's equation, which is:

$E=\frac{hc}{\lambda}$ .....(1)

where,

E = energy of the light

h = Planck's constant

c = speed of light

$\lambda$ = wavelength of light

We also know that:

$\nu=\frac{c}{\lambda}$ ......(2)

where,

$\nu$ = frequency of light

From equation 1 and 2, we get that wavelength is inversely proportional to energy as well as frequency of the light. So, if the wavelength of light is high, that means energy and frequency will be low.

Hence, the correct answer is lower, lower.

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Which of the following solutions is a buffer? Which of the following solutions is a buffer? a solution of sulfuric acid and sodi

Sever21 [200]

Answer:

a solution of acetic acid and sodium acetate

Explanation:

A buffer solution is defined as a solution which resist a change in pH when small quantity of a strong acid or a strong base are added. A buffer solution is made up of mixture of a weak acid and its conjugate base or a mixture of a weak base and its conjugate acid.

Acetic acid is the only option because it is a weak acid with a corresponding conjugate base, acetate. Unlike a solution of sulfuric acid and sodium sulfate in which the sulfuric acid is a strong acid which doesn’t qualify it to be a buffer solution. The remaining options have different acid compounds paired together which makes them invalid too.

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3 years ago

A compound with molecular formula C6H15N exhibits a singlet at d 0.9 (1H), a triplet at d 1.10 (3H), a singlet at d1.15 (9H), an

LuckyWell [14K]

Answer:

N-ethyl-2-methylpropan-2-amine

Explanation:

In this case, we have to start with the IR info. The signal on 3400 cm^-1 indicates the presence of a hydrogen bonded to the heteroatom. In this case, we have nitrogen in the formula, so we will have the amine group.

On the other hand, we have to analyze the NMR info:

a) We have 2 singlets => This indicates the presence of 2 different hydrogens without neighbors.

b) We have a triplet => This indicates the presence of CH3 bonded to a CH2.

c) We have a quartet => This indicates the presence of CH2 bonded to a CH3.

From b) and c) we can conclude that we have the ethyl group bonded to a nitrogen.

Finally, we have to add 4 more carbons in such a way that we only have a single signal. In this case the ter-butyl group.

In that way, we will have 2 singlets (from the CH3 groups in the ter-butyl and the H on the N). Also, we will have the quartet on the CH2 in the ethyl group and the triplet on the CH3 in the ethyl group

6 0

3 years ago

You already converted mass to moles for the reactants now convert mass to moles for the product, copper 0.71 g Cu equals

skelet666 [1.2K]

Answer: 0.011 moles.

Explanation:-

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

Given :

Mass of copper = 0.71 g

Molar mass of copper = 63.5 g/mol

Putting i the values, we get:

$\text{Number of moles of copper}=\frac{0.71g}{63.5g/mol}=0.011moles$

Thus the number of moles of copper in 0.71 g of copper is 0.011 moles.

3 0

4 years ago

How many electrons does an ion of magnesium have if it’s represented by the symbol shown below? 25Mg2+

Galina-37 [17]

Answer:

10 electrons.

Explanation:

Hello!

In this case, since a normal atom of magnesium has 12 protons and electrons when is not in the form of a cation, since it is a metal that tends to lose electrons when ionized, and therefore it becomes positively charged, we infer that in form of:

$Mg^{2+}$

It only has 10 electrons.

Best regards!

7 0

3 years ago

What enzyme is responsible for transcription?

oksian1 [2.3K]

RNA polymerase - synthesises RNA nucleotides from a DNA template to create mRNA

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3 years ago

Infrared radiation has a longer wavelength, ____ frequency, and ____ energy than visible light.

Infrared radiation has a longer wavelength, frequency, and energy than visible light.