B. The third shell would be empty so that the eight electrons in the second level would be outermost after the atom loses one electron.
Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream
Equal volumes of equal concentrations of strong acid and strong base are mixed. Because the volumes and molarities are equal, the number of mole NaOH and HCl are equal.
From reaction
HCl + NaOH ---> NaCl +H2O
we can see that if number of moles HCl and NaOH are equal, they will react completely, and no acid or base is going to be in solution anymore.
So, pH=7.
D 42.2 L/mol I’s is it I got it correct
To work out the time taken to travel a certain distance a ta certain speed, we divide the distance by the speed.
So, 3/5 = 0.6 hours. To convert this to minutes, we need to work out 0.6 of 60. We can do this by simply multiplying 0.6 by 60, to get 36 minutes.
Hope I helped! xx