50.0 g of water at 22 degrees celsius is mixed with 125 g of water initially at 36 degrees celsius. what is the final temperature of the water after mixing, assuming no heat is lost to the surroundings?

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.