Hey there!
Compounds with ionic bonds have higher melting points because of the forces needed to break through the strong forces of attraction holding it together.
Compounds with covalent bonds have lower melting points because less energy is needed to break the weaker forces of attraction.
So, your answer is C. Compound 1 is ionic, and compound 2 is molecular.
Hope this helps!
Answer:
V = 15.9512 dm³
Explanation:
Given data:
Pressure = P = 1.37 atm
Temperature = T= 315 K
Number of moles of nitrogen= n = 0.845 mol
Volume = V = ?
Formula:
PV = nRT
Now we will put the values in equation.
V = nRT/ P
V = ( 0.845 mol× 0.0821 dm³.atm.K⁻¹.mol⁻¹ × 315 K) / 1.37 atm
V = 21.853 dm³. atm/ 1.37 atm
V = 15.9512 dm³
The moon would have appeared more vividly and brightly due to the absence of light pollution and smog
Answer:
Energy and frequency are directly related to each other.
Explanation:
Energy of photon is directly related to each other. The wave with high frequency have high energy.
Mathematical expression:
E = h.f
f = frequency
h = plancks constant
while wavelength and energy are inversely related to each other. The wave with higher wavelength have low energy.
Mathematical relationship:
f = c/λ
F = h. c/λ
Example:
Frequency of wave = 1.0 ×10¹¹ Hz
Wavelength of wave = ?
Energy of wave = ?
Solution:
speed of wave = wavelength × frequency
wavelength = speed of wave/ frequency
wavelength = 3×10⁸ m/s / 1.0 ×10¹¹ s⁻¹
wavelength = 3×10⁻³ m
Energy:
E = h. f
E = 6.63×10⁻³⁴ Kg.m²/s × 1.0 ×10¹¹ s⁻¹
E = 6.63×10⁻²³ Kg.m²/s²
Kg.m²/s² = j
E = 6.63×10⁻²³ j
