What volume of 0.100 m na3po4 is required to precipitate all the lead(ii) ions from 300 ml of 0.250 m lead

How are isotopes of the same chemical element alike? how are they different?

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?

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?