Why is it necessary for the stomach contents to be so acidic? how does the stomach protect itself from digestion?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space

How many moles are contained in 5.6 l of h2 at stp