What is true about matter in a chemical reaction? * None of these statements are true.
Matter can be created or destroyed.
Matter can sometimes be created or destroyed.
Matter cannot be created or destroyed.

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which statement best explains the relationship between an area is geography and the temperature of its surface water

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