Answers:
(a) 508 THz; (b) 337 zJ
Step-by-step explanation:
The formula relating the frequency (f) and wavelength (λ) of a photon is
fλ = c Divide both sides by λ
f = c/λ
The formula for the energy of a photon is
E = hf
Data:
c = 2.998 × 10⁸ m·s⁻¹
λ = 590 nm
h = 6.626 × 10³⁴ J·s
Calculations:
(a) <em>Frequency
</em>
f = 2.998 × 10⁸/(590 × 10⁻⁹)
= 5.08 × 10¹⁴ s⁻¹
= 508 × 10¹² s⁻¹
= 508 THz
(b) <em>Energy
</em>
E = 6.626 × 10⁻³⁴ × 508 × 10¹²
= 3.37 × 10⁻¹⁹ J
= 337 × 10⁻²¹ J
= 337 zJ
SO2 + 2Li2Se → SSe2 + 2Li20
The answer to this question is False
I would say the reason why he is wrong is because we don't always have the same gravity as other planets do and while some stars might disapear or be pulled away it is all about the gravity pull towards the star or against the star<span />
The charge of the ion, HPO₄⁻² is equal to -2. This is the same as the one written before it as it appears in the formula of the substance. Since, in the given chemical formula, HPO₄ does not have any multiplier, the charge of the atom or ion that should appear before it is +1. The atoms that will have a charge of +1 are those in group A1. These are Na+, Li+, K+, Rb+, Cs+ and Fr+.