What happens when the threat of exposure to dirty air is reduced in a community?
there is enough oxygen available for people's lungs to function normally
the amount of indoor air pollutants released during a fossil fuel burn decreases
there is a minimal exposure risk to the outdoor dirty air pollutants like carbon monoxide and radon.
the risk of experiencing digestive related diseases from exposure to a buildup of dirty air is low

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet