When the equation Sb2S3 + HCl ? SbCl3 + H2S is balanced, the coefficient of H2S is
a. 3.
b. 1.
c. 2.
d. 4.
a
Physics & Space Science
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The concentration of oxygen in the atmosphere has been near or above its current value for the past
A) 200 million years B) 542 million years C) 65 million years D) 360 million years
Physics & Space Science
How many megabytes are there in a gigabyte?
a. 10 b. 1000 c. 1000000 d. none of the above
Physics & Space Science
The gas, C3H8, is used in outside grills, and several moles of this gas will burn during an afternoon's grilling. What is the mass of one molecule of this gas?
a. 4.4 × 10^–23 g b. 7.3 × 10^–23 kg c. 7.3 × 10^–26 kg d. 8.8 × 10^–26 kg
Physics & Space Science
When a damping force is applied to a simple harmonic oscillator which has period T0 in the absence of damping, the new period T is such that
a. T < T0. b. T = T0. c. T > T0. d. ?T < ?0T0. e. ?T > ?0T0.
Physics & Space Science