Help help chem question

50 pts plz what is the physical state of matter of baking soda.

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

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.