Which represents the balanced double displacement reaction between sodium chloride (na+cl-) and copper sulfate (cu2+(so4)2-) ?

nacl + cu(so4) --> na2(so4) + cucl2

nacl + cu(so4) --> na(so4) + cucl

2nacl + cu(so4) --> na2(so4) + cucl2

nacl + cu(so4) --> cl(so4) + nacu

What is the molarity of 60.0 grams of naoh dissolved in 750 milliliters of water? a) 1.1 m b) 2.0 m c) 12 m d) 75 m

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone, due to its high light availability and warm water temperature

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false