it takes a middle school student's body 5 hours to metabolize 1/2 of the caffeine in a shamrock shake. there are 320 mg of caffeine per shake. Erin wakes up on St Patty's Day and drinks 3 shamrock shakes at 7 a. m. By what time will Erin's body have metabolized the caffeine to 60 mg?

Why does his teacher ask him to balance the equation by including the correct coefficient

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)