1. which of the fallowing were found to destroy ozone in the upper atmosphere?

a) sulfur oxides
b) cfcs
c) nitrogen oxides
d) carbon dioxide

2. which of the following sets of terms is associated with air pollution caused by burning fossil fuels?

a) acid rain, ozone hole, skin cancer
b) methane, smog, carbon dioxide
c)sulfur dioxide, smog, chlorofluorocarbons
d)carbon dioxide, smog, acid rain

3. which of the following phrases describes a proven method for dealing with the problem of air pollution?

a) laws and treaties that limit or ban pollutants
b) convincing people to accept pollution
c) voluntary reduction in the numbers of automobiles on the road
d) decreased trade between countries

4. which of the following contributes to air pollution?

a) mowing the lawn
b) watering the lawn
c) burning leaves and brush
d) sprinkling fertilizer around plants

whoever answers gets 20 points and brainlest answer. sorry if i made mispelled words a lot i was not looking at my keyboard to write this

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

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?

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?