3 years ago

What was the name for the secret code used by many alchemists?

Chemistry

1 answer:

ahrayia [7]3 years ago

5 0

Answer:

A. Zodiac

B. Palingenesis

C. Palabra mysteria

D. Decknamen

The correct answer is D. Decknamen.

Explanation:

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c. because it lacks oxygen which might support life of the bacteria

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3 years ago

How many moles of N2 will occupy a 5.58 L container at STP?

melamori03 [73]

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3 years ago

What is the wavelength of an electron with a mass of 9.109×10−31 kg and a velocity of 3.43×107 ms? Use 6.626×10−34kg m2s for Pla

anyanavicka [17]

<u>Answer:</u> The wavelength of an electron is $2.121\times 10^{-11}m$

<u>Explanation:</u>

To calculate the wavelength of a particle, we use the equation given by De-Broglie's wavelength, which is:

$\lambda=\frac{h}{mv}$

where,

$\lambda$ = De-Broglie's wavelength = ?

h = Planck's constant = $6.626\times 10^{-34}Js$

m = mass of electron = $9.109\times 10^{-31}kg$

v = velocity of electron = $3.43\times 10^{7}m/s$

Putting values in above equation, we get:

$\lambda=\frac{6.626\times 10^{-34}Js}{(9.109\times 10^{-31}kg)\times (3.43\times 10^{7}m/s)}$

$\lambda=2.121\times 10^{-11}m$

Hence, the wavelength of an electron is $2.121\times 10^{-11}m$

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4 years ago

Lenny accidentally drops his matchbox car into a graduated cylinder. The car has a mass of 10 grams and the water level in the c

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Answer:

The answer is 2

Explanation:

I got it right in the k12 test :)

teehee

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4 years ago