How many of the zeros in the measurement 0.050060 are significant

What is the mass of sodium in 3 moles of sodium chloride

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?