)how many molecules are in 23 moles of sodium? 4) how many moles are in 8.022 x 1026 molecules of nacl?

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

In which of these cases are the two wave points considered to be in phase with each other?