Ireally need getting this done by today. .

a pharmaceutical company is testing a new drug. for the study, the company enrolled 200 people who had previously been diagnosed with a specific condition. half took the study drug and half took a placebo. throughout the study, the participants were routinely asked to fill out a 50-question survey. after six months, the participants on the study drug showed positive improvements in their answers. what is the best way the company could improve this study to prove more thoroughly that its medications work?
decrease the proportion of placebo subjects to be less than half of the test population.
combine results of the survey with quantitative data, like blood tests or brain scans.
increase the length of the survey to 100 questions to check for statistical anomalies.
include test subjects who have been diagnosed with a similar condition.

The best way the company could improve this study to prove more thoroughly that its medications work is to combine results of the survey with quantitative data, like blood tests or brain scans. :)

it creates acid rain

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.