Activity
Plastic
Paper
use of materials
in production
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Gina's community is considering whether it should ban
the use of plastic bags. Help her analyze the costs and
benefits of using plastic and paper bags by completing
the paragraph.
Based on the data presented,
bags
have less impact on Earth's resources. Even though
bags have less impact on organisms
in the oceans, the production of
bags
uses more of Earth's materials and releases more
carbon into the atmosphere
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release of
carbon in
production
energy use in
production
water use in
production
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litter in oceans

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Hi + naoh -> h2o + nal

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.   

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.