Gastric acid pH can range from 1 to 4, and most of the acid is HCl. For a sample of stomach acid that is 2.59×10−2 M in HCl, how many moles of HCl are in 19.1 mL of the stomach acid?

Express the amount to three significant figures and include the appropriate units.

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Which substance has non polar covalent bonds

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?