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1. what does the term carrying capacity describe?
a) the maximum number of birth rates for a population.
b) the ability of a population to accept new immigrants.
c) the population size that the environment can sustain.
d) the ratio of birth rates to death rates in a population.
2. which factor is a density-dependent limiting factor on the population of a species?
a) predation
b) unusual weather
c) natural disasters
d) seasonal variation
3. which nutrient cycle is most affected by the over-use of ammonia fertilizers on commercial farms, as well as by the accumulation of waste on cattle farms and feed lots?
a) water
b) carbon
c) nitrogen
d) phosphorus

What type of electromagnetic radiation has a shorter wavelength than blue light

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely. analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2