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nydimaria [60]
3 years ago
9

Calculate the wavelength of light with an energy of 3.60x10^-19 J *

Chemistry
1 answer:
Travka [436]3 years ago
3 0

Explanation:

from E = mc^2 and de Broglie wavelength=h/mc

combine the eqns with respect to m(considering the body is moving with the speed of light(c))

then

E= hc/de Broglie wavelength

since, c= 3× 10^ 8

h= 6.626 × 10^ -34 and E is given, substitute the values.

sorry I don't have my calculator.

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Your body gets 40% of blood in your brain when on rest.

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4 0
3 years ago
In this reaction, what roll does the lead (II) nitrate play when 50.0 mL of 0.100M iron (III) chloride are mixed with 50.0 mL of
scoundrel [369]
Lead(II) nitrate will react with iron(III) chloride to produce the precipitate lead(II) chloride as shown in the balanced reaction
     2FeCl3(aq) + 3Pb(NO3)2(aq) → 2Fe(NO3)3(aq) + 3PbCl2(s)   
Calculating the amount of the precipitate lead(II) chloride each reactant will produce: 
     mol PbCl2 = 0.050L Pb(NO3)2 (0.100mol/1L)(3mol PbCl2/3mol Pb(NO3)2)
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8 0
3 years ago
Read 2 more answers
What is the empirical formula of a compound consisting of 29.6% oxygen and 70.4% fluorine by mass?
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O1Fl2

1. Assume an 100g sample, so the percentage will stay the same

2. Covert each element into their molar mass
29.6/16.00=1.8 mols of O
70.4/19.00=3.7 mols of Fl

3. Divide both by the smallest value of mol
1.8/1.8=1 O
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3 0
3 years ago
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Please I really really need help!!!
ira [324]

Answer:

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3) 17

4) 120

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Explanation:

Please see attached picture for full solution.

6 0
3 years ago
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the latest weather report includes the following statement: the temperature is 78°f, barometric pressure is 29 and the relative
NeX [460]

Answer:

78

Explanation:

6 0
3 years ago
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