What is the pH of an HNO3 solution with a molarity of 0.023? ( hint: pH = -log[H+] )

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4

Air can be considered a mixture. which statement does not explain why?