1. Human saliva has a pH of 6 while the contents of the stomach has a pH of 2. How much greater is the concentration of hydrogen ions in the stomach over that in saliva

Is Sodium chloride an element, compound, or mixture?

Which of the following lists elements in order of increasing malleability? A. Zn, C, Al B. Zn, Al, C C. C, Al, Zn

What's the difference between the three types on natural radioactivity

What would be the Half Reactions for a spontaneous reaction using Zn and Cu electrodes?

If 78.4 grams of aluminum metal react with excess hydrochloric acid, how many grams of hydrogen gas can be produced?2al + 6hcl yields 2alcl3 + 3h2

Mixtures have (exact, relative) amounts of the same substances

The Doppler effect indicates that the universe is expanded because A. light from other galaxies is different colors B. light from other galaxies are blue shift C. light from other galaxies are red shift D. light from other galaxies is the same color

2. What is the importance of meiosis and fertilization in sexual reproduction?

Molecules are the smallest units of matter with the characteristic properties of a substance. a. True b. False

For the following hypothetical reaction: 3A + 2B - > 3C. How many moles of C can you produce with 5 moles of A and excess B?