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2 years ago

I'm currently doing a Castle Learning part teacher and it's graded

Chemistry

1 answer:

kipiarov [429]2 years ago

4 0

See the image below.

An excited electron is in a high-energy state.

When it drops to the lower-level ground state, it must get rid of this excess energy by emitting it as a quantum of light.

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Convert 11 degrees Fahrenheit into degrees Celsius and then into kelvin. Show your work.

olchik [2.2K]

Celsius: -11.7

Kelvin: 261.5

Hope it helps! Please mark Brainliest! :)

7 0

2 years ago

As water evaporates from a solution, minerals become more concentrated and begin to form a rock. what type of rock is it.

Nata [24]

B. chemical sedimentary is your answer.

6 0

2 years ago

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 16.0 g of luminol into a total vol

nikitadnepr [17]

The molarity of the stock solution of luminol is 1.2 M

calculation

step 1: find the moles of luminol using (moles= mass/molar mass) formula

molar mass of Luminol= 177 g/mol

moles is therefore= 16.0 g/ 177 g/mol=0.0904 moles

Step 2: find the molarity using (molarity= moles/volume in liters) formula

convert Ml into liters = 75.0/1000= 0.075 L

molarity is therefore= 0.0904 moles/ 0.075 L= 1.2M

6 0

3 years ago

Compounds have two or more

frozen [14]

Answer: B

Explanation:

6 0

3 years ago

How many unique 13C NMR signals exist in the spectrum for the following compound?

yawa3891 [41]

Answer:

Five signals exist in the spectrum of 4-methylpent-1-ene.

Explanation:

Nuclear Magnetic Resonance (NMR) is the main technique used by Scientists particularly by Chemists to elucidate the structure of compounds mainly organic compounds.

There are different NMR techniques which are used to characterize different NMR active nuclei like ¹H-NMR, ¹³C-NMR, ¹⁵N-NMR, ¹⁹F-NMR e.t.c.

In given case the compound will show five different signal for six carbon atoms. THis is because among the six carbon atoms two of them have same electronic environment means they are having same electron surrounding thus, they will share a signal at same ppm. Hence, the signals and each signal shown by each carbon atom is shown below.

6 0

2 years ago