Balance the chemical equation: Bi2S3+ O2 ? Bi2O3 + SO2
2Bi2S3 + 9O2? 2Bi2O3 + 6SO2
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If the column of mercury in a barometer stands at 73.0 cm, what is the atmospheric pressure? (The density of mercury is 13.6 × 10^3 kg/m3 and g = 9.80 m/s2)
a. 9.73E+4 N/m2 b. 9.73E+6 N/m2 c. 1.17E+5 N/m2 d. 1.83E+3 N/m2 e. 1.01E+5 N/m2
Monochromatic light is incident on a metal surface and electrons are ejected. If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?
A) Greater rate; same maximum energy. B) Same rate; greater maximum energy. C) Greater rate; greater maximum energy. D) Same rate; same maximum energy.
A candle is 49.0 cm in front of a concave spherical mirror of radius of curvature 70.0 cm. What are the image distance and the magnification, respectively?
a. -20.4 cm, +0.417 c. +20.4 cm, -0.417 b. +122.5 cm, -2.50 d. +122.5 cm, +2.50
In a double-slit experiment using light of wavelength 486 nm, the slit spacing is 0.600 mm and the screen is 2.00 m from the slits. Find the distance along the screen between adjacent bright fringes