Answer:
E = 2.93×10⁻¹⁹ J
Explanation:
Given data:
Wavelength of photon = 678 nm (678×10⁻⁹ m)
Energy of photon = ?
Solution:
Formula:
E = h c/λ
h = 6.63×10⁻³⁴ Js
c = 3×10⁸ m/s
E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s / 678×10⁻⁹ m
E = 19.89 ×10⁻²⁶ Jm / 678×10⁻⁹ m
E = 0.0293×10⁻¹⁷ J
E = 2.93×10⁻¹⁹ J
The correct answer is C. complex sold compound
hope this helps you
Answer:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Explanation:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Answer:
37.5 g of H₂
Explanation:
N₂ (28g) + 3H₂ (6g) => 2NH₃ (34g)
Every 28g of N₂ needs 6g of H₂
=> Every 7g of N₂ needs 1.5g of H₂
=> 175g of N₂ needs 1.5 x 25 g of H₂
=> 37.5 g of H₂
1 mole of an alkane gives 2 moles is correct answer
