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Vikentia [17]
3 years ago
8

10) What is the energy of a photon whose frequency is 2.7 X 1014 Hz?

Chemistry
1 answer:
rjkz [21]3 years ago
4 0

Answer: c

Explanation:

E=hf

h = constant

f = frequency

E=(6.626x10^-^3^4J/s)(2.7x10^1^4Hz)\\E=1.78902x 10^-^1^9

moving the point 1 number to the right, and rounding up, leaves us with;

E=17.9x 10^-^2^0

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Calculate the amount of heat required to completely sublime 55.0 g of solid dry ice CO2 at its sublimation temperature. The heat
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Answer:

40.4 kJ

Explanation:

Step 1: Given data

  • Mass of CO₂ (m): 55.0 g
  • Heat of sublimation of CO₂ (ΔH°sub): 32.3 kJ/mol

Step 2: Calculate the moles corresponding to 55.0 g of CO₂

The molar mass of CO₂ is 44.01 g/mol.

n = 55.0 g × 1 mol/44.01 g = 1.25 mol

Step 3: Calculate the heat (Q) required to sublimate 1.25 moles of CO₂

We will use the following expression.

Q = n × ΔH°sub

Q = 1.25 mol × 32.3 kJ/mol = 40.4 kJ

7 0
2 years ago
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3 years ago
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When cyclohexene is treated with KMnO4, H2O, the syn-1,2-diol is produced. What reaction occurs when benzene is similarly treate
Ulleksa [173]

Answer:

No reaction is observed

Explanation:

The benzene ring is aromatic. Being an aromatic ring, the benzene ring is remarkably stable to all reactions that destroy the aromatic ring.

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What is a very strong dipole-dipole force?​
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Explanation:

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