This is false, all non metals have different physical properties.
Answer: 193 mg of theobromine are present in the sample.
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.
To calculate the moles, we use the equation:

1 mole of theobromine
weigh = 180 g
of theobromine
weigh =
(1g=1000mg)
193 mg of theobromine are present in the sample.
Answer:
When a wave is present in a medium (that is, when there is a disturbance moving through a medium), the individual particles of the medium are only temporarily displaced from their rest position.
Explanation: