The general formula RNH2 is that of
a. an ester.
b. an amine.
c. an amide.
d. none of these
b
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Which of the following statements best describes the general pattern of composition among the four jovian planets?
a. Jupiter is made mostly of hydrogen and helium, while the other three jovian planets are made mostly of hydrogen compounds. b. Jupiter is made mostly of hydrogen, Saturn is made mostly of helium, Uranus is made mostly of hydrogen compounds, and Neptune is made mostly of rock. c. Uranus and Neptune contain relatively more rock and hydrogen compounds than Jupiter and Saturn. d. All four planets have essentially the same composition.
The electric field inside an uncharged metal ball is zero. If the ball is negatively charged, the electric field inside the ball is then
A) less than zero. B) zero. C) greater than zero.
Why does the Moon play a larger role in tides than the Sun?
What will be an ideal response?
Choose the correct word(s) that make the statement true. Say you live in the southern hemisphere and the date is June 22 . For you, fall is ending. Therefore, the June 22nd date is the first day of (spring, summer, fall, winter), an event called the (vernal equinox, summer solstice, autumnal equinox, winter solstice)
What will be an ideal response?