The wavelength is 4.0 * 10^-13 m while the frequency is 7.5 * 10^20 s−1
Using the formula;
E =hf
Where
E = Energy of the photon
f = Frequency of photon
h = Plank's constant = 6.6 * 10^-34 Js
To obtain the energy in Joules;
E = 3.02 × 10^11 J/mol/6.02 * 10^23 mol
= 5 * 10^-13 J
f = E/h
f = 5 * 10^-13 J/6.6 * 10^-34 Js
f = 7.5 * 10^20 s−1
f = c/λ
c = speed of light = 3 * 10^8 m/s
λ = c/f
λ = 3 * 10^8 m/s/7.5 * 10^20 s−1
λ = 4.0 * 10^-13 m
The wavelength is 4.0 * 10^-13 m while the frequency is 7.5 * 10^20 s−1
Learn more: brainly.com/question/2393994
<span>0.06355391 mol
The balanced equation for the reaction is
Na2B4O7*10H2O + 2 HNO3 = 2 NaNO3 + 4 H3BO3 + 5 H2O
So for each mole of Borax to neutralize, it takes 2 moles of HNO3.
Calculate number of moles of Borax
0.2619 g / 381.372 g/mol = 0.0006867 mol
Moles of HNO3 used = 0.0006867 mol * 2 = 0.0013734 mol
Molarity is defined as moles per liter so divide the number of moles used by the volume in liters. So
0.0013734 / 0.02161 = 0.06355391 mol</span>
2 NaCl --------> 2 Na + Cl₂
2 mol * 23 g Na = 46 g
2*35,5 g Cl = 71
46 g Na --------- 71 g Cl₂
460 g Na -------- ?
mass ( Cl₂) = 460 . 71 / 46
Mass (Cl₂) = 32660 / 46
m= 710 g of Cl₂
<span>hope thips helps</span>
Answer:
Explanation:
The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:
11.0 g KBr (1mol KBr/119.002g KBr * 1mol Br2/2mol KBr * 159.808g Br2/1mol Br2= 7.39 g Br2.)
The theory of infinite universe and the theory of vacuum as a substance. First was disproved by the discovery of the big bang and the later by some experiments with light which have shown that vacuum is not a substance but empty space.
