Which of the following is the characteristic feature of all alkenes?
A) the presence of one or more carbon-carbon double bonds
B) the presence of one or more carbon-carbon triple bonds
C) the presence of at least one carbon-carbon double bond, and at least one carbon-carbon triple bond
D) the presence of a ring system
A
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Which type of radiation-alpha, beta, or gamma-results in the least change in atomic number?
A. gamma radiation B. alpha radiation C. beta radiation D. They all result in the same change in atomic mass number.
In a particular titration experiment a 25.0 mL sample of an unknown diprotic acid required 30.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?
A) 0.120 M B) 0.167 M C) 0.240 M D) 0.333 M
Which of the following is not true of red blood cells?
A) They are destroyed in the kidneys. B) They are formed in bone marrow. C) They have a nucleus. D) None, all of these are true.
Explain what circumstances make streamflow so unsystematic and irregular
What will be an ideal response?