Which pair are actually the same compound?
a. (CH3)3 N and CH3CH2CH2NH2
b. CH3CH2CH(NH2)CH3 and CH3CH(NH2)CH2CH3
c. CH3CH(Cl)CH3 and CH3CH2CH(Cl)CH3
d. CH3(CH2)2CH3 and CH3CH2CH(CH3)2
e. CH3CH2CH2NH2 and CH3CH2CH2N2H2
b
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An annular eclipse
A. occurs when the Moon's shadow does not completely reach Earth during a solar eclipse. B. occurs when Earth's shadow does not completely reach the Moon during a lunar eclipse. C. is a lunar eclipse that happens every November. D. is a solar eclipse that happens every November.
The least common type of star is a(n) ____
a. white dwarf b. lower main sequence c. upper main sequence d. giant e. supergiant
In an LC circuit containing a 40-mH ideal inductor and a 1.2-mF capacitor, the maximum charge on the capacitor is 45 mC during the oscillations. What is the maximum current through the inductor during the oscillations?
A) 3.7 A B) 42 A C) 6.5 A D) 10 A E) 2.5 A
What is the wavelength of the K? line for Mercury?
A) 5.38 × 10-12 m B) 1.94 × 10-11 m C) 1.85 × 10-11 m D) 3.02 × 10-12 m