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Leviafan [203]
2 years ago
6

Explain why the fingertip and not the palm of the hand is used to detect braille symbols​

Chemistry
1 answer:
8090 [49]2 years ago
3 0

Answer:

The Braille is the dots arranged in cell to identify the letter, number and symbols. the Braille system is identified using the fingers. the fingertip is used for identifying the nature of number and symbol. the difference is made by detecting the number and symbol.

Explanation:

Hope this helped Mark BRAINLEST!!!!

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How does the jet stream influence weather?
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Jets streams play a key role in determining the weather because they usually separate colder air and warmer air.
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What exacerbates the heat waves?
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A heatwave occurs when a system of high atmospheric pressure moves into an area and lasts two or more days.

Explanation:

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What is a common reason for observing an increased chemical shift of a c-h proton
stira [4]

Deshielding due to an electronegative element close by is the common reason for observing increased chemical shift of a c-h proton

<h3>What is a chemical shift? </h3>

The resonance frequency of a proton in relation to a standard compound is represented by chemical shift. Chemical shift, which is measured in ppm and is represented by the sign (δ),  (parts per million).The chemical shift in a proton NMR spectrum provides details about the targeted proton's chemical surroundings. The structure of the investigated substance, especially electronegative components or effects, has a significant impact on the chemical shift value. Electronegative elements' ability to remove electron density from the proton, which raises the chemical shift value, is one explanation for this. The proton is more exposed to the magnetic field that is being applied externally as a result of this process, which is referred to as de-shielding.

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3 0
2 years ago
2
Katyanochek1 [597]
C because a compound is a substance made of at least two atoms bonded together
4 0
3 years ago
How many grams of HF are needed to react with 3.0 moles of Sn?
Flauer [41]

Answer:

120g

Explanation:

Step 1:

We'll begin by writing the balanced equation for the reaction.

Sn + 2HF —> SnF2 + H2

Step 2:

Determination of the number of mole HF needed to react with 3 moles of Sn.

From the balanced equation above,

1 mole of Sn and reacted with 2 moles of HF.

Therefore, 3 moles Sn will react with = 3 x 2 = 6 moles of HF.

Step 3:

Conversion of 6 moles of HF to grams.

Number of mole HF = 6 moles

Molar Mass of HF = 1 + 19 = 20g/mol

Mass of HF =..?

Mass = number of mole x molar Mass

Mass of HF = 6 x 20

Mass of HF = 120g

Therefore, 120g of HF is needed to react with 3 moles of Sn.

3 0
3 years ago
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