The Gateway Arch in St. Louis, MO is approximately 630 ft tall. How many U.S. half dollars would be in a stack of the same height? Each half dollar is 2.15 mm.   number of half dollars:     Each half dollar has a mass of 11.340 g. How much would the stack of half dollars from the previous question weigh?   mass in g:     What is the value, in dollars, of the same stack of half dollars?   value in dollars:     The 2017 U.S. gross domestic product (GDP) was valued at 19,390,604,000 dollars. How many Gateway Arch‑height stacks of half dollars are needed to match the GDP in value?   number of stacks:

Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water (H,O) and carbon dioxide (CO,) chemically react to form the simple sugar glucose (C,H1206) and oxygen gas (02). What mass of simple sugar glucose is produced by the reaction of 8.96 g of carbon dioxide? Round your answer to 3 significant digits. |x10

Hydrocortisone is used as an anti-inflammatory for localized pain. You need to prepare a 45 mg/mL solution of hydrocortisone for an injection via a dilution.  You have 15 mL of a 175 mg/mL stock solution of hydrocortisone available.  How many mL of the 45 mg/mL solution can you prepare? Note:  Provide your answer using the correct number of significant figures and remember to include your units.

A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 78.0 mL. The liquid solvent has a mass of 49.9 g and a density of 0.865 g/mL. Determine the mass of the solid given its density is 3.25 g/mL. mass: g