Hydrogen peroxide with concentration of
3.0percent ( 3.0 g of h202 in 100 ml of solution) is sold
indrugstorese ofo use as an antiseptic. for a 10 ml 3.0 percenet
h202solution, calculate (a) the oxygen gas produce in litters at
stpwhen the compount undergoes complete decompostion and (b)
thteratio of the volume of 02 collected to the intial volume of
theh2o2 solution.

(a) To calculate the oxygen gas produced in litters at STP when the compound undergoes complete decomposition. First note the equation at decomposition below

2H2O2(aq) → 2H2O(l) + O2(g)

Then

(3.0 g/100 ml)(10 ml) = 0.3 g H2O2

divide by Mass of H2O2 which is 34 g/mole,

0.3/34 = 0.00882353

this will arise to 8.8 x 10-3 molesH2O2

then multiply the moles H2O2 by: (1 mole O2/2 mole H2O2)= 4.4 x 10-3moles O2

To calculate the volume (in L) of Oxygen 02, we have to use the ideal gas equation:

VO2 = nO2RT/P;

n = 4.4 x10-3moles, P = 1 atm, R - 0.0826 L-atm/mol-K andT = 273K

V02 = 99.22 X 10∧-3

(b) divide volume of O2 from (a) by 10 ml (0.010L - initialvolume of H2O2)

9.92 X10∧-3

Explanation:

a) To calculate the oxygen gas produced in litters at STP when the compound undergoes complete decomposition. First note the equation at decomposition below

2H2O2(aq) → 2H2O(l) + O2(g)

Then

(3.0 g/100 ml)(10 ml) = 0.3 g H2O2

divide by Mass of H2O2 which is 34 g/mole,

0.3/34 = 0.00882353

this will arise to 8.8 x 10-3 molesH2O2

then multiply the moles H2O2 by: (1 mole O2/2 mole H2O2)= 4.4 x 10-3moles O2

To calculate the volume (in L) of Oxygen 02, we have to use the ideal gas equation:

VO2 = nO2RT/P;

n = 4.4 x10-3moles, P = 1 atm, R - 0.0826 L-atm/mol-K andT = 273K

V02 = 99.22 X 10∧-3

(b) divide volume of O2 from (a) by 10 ml (0.010L - initialvolume of H2O2)

9.92 X10∧-3

i do not get it   at all

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.