The sun is a mid-sized, main sequence star. what stage is next in the life cycle of the sun?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

What is the final temperature after 840 joules is absorbed by 10.0g of water at 25.0c