There are some methods that differentiate waves; one thing is by its medium.
Electromagnetic waves did not require a medium for transmission such as in a
vacuum while mechanical waves require a medium to travel such as air, water or
anything that can serve as a transmission aid.
The most common sample of EM waves in
telecommunication is radio,
light and infra-red signals. An example of a mechanical wave is a sound
wave, which requires air to travel. Oscillating molecules made the
sound waves.
A covalent bond is formed between two atoms by sharing electrons. The number of bonds an element forms in a covalent compound is determined by the number of electrons it needs to reach octet.
Answer:
26.7 kJ/mol
Explanation:
- Heat required = Heat of vaporization * moles
We're given the Heat of vaporization, so now we need to <u>find the moles of acetone</u>, to do that we'll use the <em>given mass</em>:
- Molar mass of acetone (C₃H₆O) = 12*3 + 6*1 + 16 = 58 g/mol
- 50.0 g acetone ÷ 58 g/mol = 0.862 mol acetone
Now we <u>calculate the heat required</u>:
- Heat required = 31.0 kJ/mol * 0.862 mol
- Heat required = 26.7 kJ/mol
