What type of reaction gives CO2 and H2O as the only products?
a. Complete hydrocarbon combustion
b. Acid–base reaction
c. Acid–carbonate reaction
d. Single-replacement, with an acid and an active metal
a
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Which of the following observational techniques is most appropriate for measuring Doppler shifts?
A) spectroscopy (taking a spectrum) B) imaging (taking a picture) C) time monitoring (measuring how the amount of light changes with time)
The lack of large impact craters on the surface of Europa is consistent with
A) active volcanism that is constantly resurfacing the crust B) the surface being covered with an ocean of liquid water C) the crust being so thick and hard that impacts leave no marks on the surface D) a subsurface ocean of water because large impacts will break the thin crust causing water and slushy ice below to flood out and resurface the crust
A stable electron orbit cannot exist if its circumference is
A) a single wavelength. B) 2 wavelengths. C) 2.5 wavelengths. D) any of the above E) none of the above
A pendulum is made with a 4.00 kg mass suspended at the end of a 75.0 cm thin rod. The pendulum is started at an angle of 20.0 degrees with the vertical. What is the velocity of the pendulum as it passes through the origin?
A. 98.9 cm/s B. 94.2 cm/s C. 89.2 cm/s D. 82.1 cm/s E. 79.5 cm/s