What mass of oxygen (in grams) is produced when 122.6 g of KCI03(formula mass = 122.6 amu) takes part in this reaction?
A) 32.00 grams
B) 48.00 grams
C) 96.00 grams
D) More information is needed.
Answer: B
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Which type of reaction is 2Cu(NO3)2? 2CuO + 4NO2 + O2?
a. Single-replacement b. Double-replacement c. Combination d. Decomposition
The symbol for carbon is
a. Ca. b. Cr. c. Co. d. C.
A bullet is fired from a rifle. The end of the barrel is a circular aperture. Is diffraction a measurable effect?
A. yes B. no, because the de Broglie wavelength of the bullet is too large relative to the aperture C. yes, because the aperture may be a slit or circular aperture D. no, because the de Broglie wavelength of the bullet is too small relative to the aperture
Imagine that the wave shown below moves right along a stretched string. It meets and passes through one of the left-going waves provided in the choices. For which choice is there an instant where the string is flat?
A. A
B. B
C. C
D. D
E. None of the above