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2 years ago

How Could Spectroscopy Be Used to Distinguish Between the Following

1 answer:

5 0

Spectroscopy be used to distinguish between the following is the compound B has a peak at 3200 – 3500 cm⁻¹ in its IR spectrum.

<h3>What is spectroscopy?</h3>

Spectroscopy is the study of emission or absorption of light. It is used to study the structure of atoms and molecules.

The three types of spectroscopy are:

atomic absorption spectroscopy (AAS)
atomic emission spectroscopy (AES)
atomic fluorescence spectroscopy (AFS)

Thus, the correct option is B, the compound B has a peak at 3200 – 3500 cm⁻¹ in its IR spectrum.

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Which of the following statements is a qualitative observation? A.The branch is three meters long. B.The substance tastes bitter

notka56 [123]

There are two kinds of analysis: qualitative and quantitative

In quantitative we analyse the amount of something that is how much of something is present / the quantity. Ex: the length of branch of tree, number of students in class, volume of a liquid in a beaker.

In qualitative analysis we determine the kind of substance / quality of substance / nature of substance.

like: colour of a substance, odor of a substance or taste (bitter / sour / sweet etc) of a substance

So answer is : B.The substance tastes bitter

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3 years ago

Which river was so badly polluted that it caught fire several times ?

jekas [21]

Cuyahoga is the answer

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3 years ago

Read 2 more answers

calcium is obtained industrially by electrolysis of molten cacl2 and is used in aluminum alloys. how many coulombs are needed to

Vinvika [58]

It takes 107 minutes 22 seconds and 96500 coulombs of charge produce 20.2 g of calcium.

The balanced equation for the reaction is,

$CaCl _{2} \:→ \: Ca ^{ 2 + } + 2Cl {}^{ - }$

The half-reaction of calcium is,

$Ca ^{2 + } + 2e ^{ - } → \: Ca$

Mass of calcium = 20.2 g

The molecular mass of calcium = 40 u.

The number of moles calcium are,

$Number \: of \: moles = \frac{mass}{molecular \: mass}$

$= \frac{20.2}{40}$

$= 0.5 \: moles$

One mole of Calcium is produced by 2 moles of electrons.

So, 0.5 moles of Calcium produce,

$= 0.5 \times 2$

$= 1 \: mole \: of \: electron$

The charge required to produce 202 g of calcium is,

$= 1 \:F$

$= 1 \times 96500 \: C$

$= 96500 \: C$

Current = 15 A

The time taken to produce 20.2 g of calcium is,

$I = \frac{Q}{T}$

$T = \frac{96500}{15}$

$= 6433.3 \: s$

$= 107 \: minutes \: 22 \: seconds$

Therefore, 96500 columns of charge are required to produce 20.2 grams of calcium. And it takes 107 minutes and 22 seconds.

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7 0

2 years ago

The diagram below shows the layers in Earth's interior.

Arada [10]

Answer:

layer B is liquid because of the inner members and layer A is solid because of the outer members

5 0

2 years ago

ANSWER ASAP PLEASE

user100 [1]

Density is equal to mass divided by volume so the densest object will be the object that has the largest mass in the smallest area. In this case object A is the densest with a density of 10g/cm^3. I hope this helps. Let me know if anything is unclear.

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3 years ago