H-1 only has 1 proton and 1 electron, so its mass number is 1.
H-2 has one more neutron so its mass number is 2
H-3 has one more neutron than H-2 so its mass number will be 3.
average atomic mass = 1 x 99% + 2 x 0.8% + 3 x 0.2%
=1.012
Sound waves are produced by air flow coming from our lungs passing through our throat, more specifically our larynx and moving with two folds of tissue called vocal chords. The sound is made by the vibration of vocal chords, so the more stretched the chords are over the larynx, their frequency of vibration is higher, therefore producing higher-pitched sounds.
Answer:


Explanation:
Hello,
In this case, we can compute the energy by using the following formula for air:

Whereas the moles of air are computed via the ideal gas equation at room temperature inside the 5.5m x 6.5m x 3.0m-room:

Now, we are able to compute heat, by considering that the temperature raise is given in degree Celsius or Kelvins as well:

Finally, we compute the time required for the heating by considering the heating rate and the required heat, shown below:

Regards.
This compound should be classified as a suspension fluid. This happens when a fluid is denser than another fluid.
Salt might be a pure substance but sugar is a compound