Answer:
E Indium = 4.407 x 10⁻¹⁹ J
E Thallium = 3.716 x 10⁻¹⁹ J
Explanation:
From Planck´s equation for a given wavelength, the energy is given by.
E = h ( c/ λ )
h: Planck´s constant, 6.626 x 10⁻³⁴ J·s
c: light speed, 3 x 10⁸ m/s
λ: wavelength in m
We will need first to convert the given wavelengths to m:
451.1 nm x ( 1 m/10⁹ nm ) = 4.511 x 10⁻⁷ m
535.0 nm x ( 1 m/10⁹ nm ) = 5.350 x 10⁻⁷ m
E Indium = 6.626 x 10⁻³⁴ J·s x 3x 10 ⁸ m/s/ 4.511 x 10⁻⁷ m = 4.407 x 10⁻¹⁹ J
E Thallium = 6.626 x 10⁻³⁴ J·s x 3x 10 ⁸ m/s/ 5.350 x 10⁻⁷ m = 3.716 x 10⁻¹⁹ J
The answer is the atomic mass.
In a distillation model, it is better to let the cold water enter the bottom of the condenser and exit at the top because this can lead to a better cooling effect.
When water enters from the bottom, they will stay longer in the condenser, thus the vapor in the condenser can be cooled back into liquid faster.
In addition, this method can also save the amount of water used, since they water can stay longer in the condenser.
<u>Answer:</u> The density of sugar is
<u>Explanation:</u>
To calculate the density of a substance, we use the equation:
We are given:
Mass of sugar = 316 g
Volume of box =
Putting values in above equation, we get:
Hence, the density of sugar is
The chemical formula of the solute is NaNO3. The mass of this is 1.4*85=119 g. The boiling point of the solution is higher than water. The molarity of this solution is 1.4/2=0.7 M.