Use formula
pV=nRT
in formula n=m/M
you have to find m
P=99.8/101.325
v=0.785
R=0.0821
T=301
Answer:
it will take 444.44 min to reach 0.25 M from 0.75 M
Explanation:
since the reaction constant is k= 6.00*10⁻³ L*mol⁻¹min⁻¹. For a reaction rate of the form
-dCa/dt=k*Caⁿ
doing a dimensional analysis
[dCa/dt]= mol/(L*min) = [k]*[Caⁿ] = L/(mol*min) * (mol/L)ⁿ
then only n=2 can comply with the dimensional analysis, therefore we get a the second order reaction . Thus
-dCa/dt=k*Ca²
-dCa/Ca² =k*dt
-∫dCa/Ca² =k*∫dt
(1/Ca₂ - 1/Ca₁)= k*Δt
Δt= 1/k*(1/Ca₂ - 1/Ca₁)
replacing values
Δt= 1/k*(1/Ca₂ - 1/Ca₁) = 1/(6.00*10⁻³ L*mol⁻¹min⁻¹)*(1/0.25 M - 1/0.75 M)= 444.44 min
Answer:
11. Extinct basically means that in a species, there are no living organisms.
12. Extinct: No living organisms of the species
Endangered: Very few living organism of the species, and are in danger of being extinct
Threatened: The organisms of the species are likely to be endangered in the future.
Answer:
Intensive and extensive properties are both physical properties. However, intensive properties dont depend on the amount of matter present in a sample, whereas extensive properties do. Intensive properties only depend on the type of matter, such as color, temperature, or solubility. Extensive properties depend on the amount of matter, such as mass, volume or energy
Explanation:
Relative density<span>, or specific gravity, is the </span>ratio of the density<span> (mass of a unit volume) of a </span>substance to the density<span> of a given reference material. Specific gravity usually means relative </span>density<span> with respect to water. The term "relative </span>density<span>" is often preferred in scientific usage.</span>
