The action level for copper is 1.3 mg/L. If a 50 mL sample from a water source contained .0000045 grams of copper, how many ppm would it contain?

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 ?

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?