If everyone in the population has an equal chance of inclusion in a study, then one would say that the study used a Random sampling technique for the study. (Option A.)
The way in which we select a sample of individuals to be research participants is critical. Random sampling makes sure of the population which has to be random and need not be pre determined . The procedure we plan to implement will determine if we are biased or not , if the people know each other or not etc.
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Choosing the wrong friends can lead to a range of problems. To begin with, if your buddies insult others or you, you may become accustomed to being treated badly and direct this energy onto your family. Bad friends may put pressure on you to do things you don't want to do, which could result in negative results. Friends who do not care about your well-being are unlikely to assist you, so you may distance yourself from your family, fearing that they share your sentiments and are uninterested in your well-being. Friends can be disrespectful about your family at times, and this can make you feel obligated to agree with them, which can lead to them being rude to their own family members.
Answer:
B. CH₅N
Explanation:
The combustion reaction of a compound CₐHₓNₙ with O₂ is:
CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂
Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂
Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:
Moles CO₂ (Molar mass 44g/mol):
44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C
Mole of H₂O (Molar mass 18g/mol):
45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H
Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:
B. CH₅N
The only structure that meet this C:H ratio
C. Use the values in the ratio table to write coordinate pairs for the points on the graph.
