Answer:
f = 0.83 ×10¹⁵s⁻¹
Explanation:
Given data:
Energy of ray = 5.5 ×10⁻¹⁹ J
Frequency = ?
Solution:
Formula:
E = hf
f = E/h
J = Kg . m².s⁻²
f = 5.5 ×10⁻¹⁹ Kg . m².s⁻² / 6.63 ×10⁻³⁴ m²Kg/s
f = 0.83 ×10¹⁵s⁻¹
Answer:
Halogens have 7 valence electrons.
Explanation:
They are the most active non-metals including fluorine, chlorine, bromine, iodine, and astatine
D. all of the above, although I do find it hard to believe something like flour would have a melting point, I looked up my answer to double check.
Answer:
757.5 kPa
Explanation:
Boyle's law states that p1 * v1 = p2 * v2
v1 = 12 mL
v2 = 8 mL
p1 = 505 kPA
p2 = ?
(505)(12) = (p2)(8)
6060 = (p2)(8)
p2 = 757.5
