Determine whether the following hydroxide ion concentrations ([oh−]) correspond to acidic, basic, or neutral solutions by estimating their corresponding hydronium ion concentrations ([h3o+] using the ion product constant of water (kw). hydronium ion concentration [h3o+] solution condition greater than 1×10−7 m acidic equal to 1×10−7 m neutral less than 1×10−7 m basic it may to keep the following equation in mind as you work kw = [h3o+][oh−] = [1×10−7 m][1×10−7 m] = 1×10−14 m

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

just did the assignment and the answer was #1 +2 n

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2