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2 years ago

What's the mass of methanol?

2 answers:

8 0

Molar/molecular mass? methanol's chemical formula is: CH3OH . Mass of C = 12, Mass of O = 16, Mass of H = 1
So, molar mass of methanol is just a sum of masses of elements I listed above.
Mass of methanol = 12+3x1+16+1=32 (grams/mole or units)

Vikki [24]2 years ago

6 0

Methanol= CH3OH
C has an atomic mass of 12.011
H has an atomic mass of 1.007
O has an atomic mass of 16
Multiply 1.007 x 4 = 4.028
Add 4.028 + 12.011 + 16 = 32.04 amu is your answer.

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1 year ago

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2 years ago

An Argon laser gives off pulses of green light (wavelength = 514 nm). If a single pulse from the laser has a total energy of 10.

svetoff [14.1K]

Answer:

$n=2.59\times 10^{16}$ photons

Explanation:

$E=n\times \frac{h\times c}{\lambda}$

Where,

n is the number of photons

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

c is the speed of light having value $3\times 10^8\ m/s$

$\lambda$ is the wavelength of the light

Given that, wavelength = 514 nm = $514\times 10^{-9}\ m$

Energy = 10.0 mJ = 0.01 J ( 1 mJ = 0.001 J )

Applying the values as:-

$0.01=n\times \frac{6.626\times 10^{-34}\times 3\times 10^8}{514\times 10^{-9}}$

$\frac{19.878n}{10^{17}\times \:514}=0.01$

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2 years ago

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Explanation:

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2 years ago

You have 100 mL of a solution of benzoic acid in water; the amount of benzoic acid in the solution is estimated to be about 0.30

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Answer:

0.00370 g

Explanation:

From the given information:

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