How can we prepare for climate change??

Pl helo

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Will mark brainliest how many electrons can be held in the energy level n = 4?