Water and diluted to
A drug with
Formula weight 270 has
a moley absorptivesty of 703 at 270 nm- one
tablet is dissolve in
of a litres. If the absorbence
of
this
solution in the uv region at 270nm
to
equal
0.687
in a 1-cm cell, how
grams of the drug are contained in the tablet
a rolume
many

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

girl imma just put my comment here because i need a couple point okurrttt

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.