How many grams of water can be produced from the combination of 25.0 grams of hydrogen and 225 grams of oxygen?
A) 250 grams
B) 225 grams
C) 200 grams
D) 25 grams
Answer: B
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An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s2. It travels a distance of 1.033 km while accelerating. (a) How fast is the auto moving just as it is traveled the 1.033 km? (b) How many seconds did it take to travel the 1.033 km?
What will be an ideal response?
An aquarium contains a 5-cm layer of water (n = 1.333) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the carbon tetrachloride is 20°, what is the angle of refraction into the air?
A. 20° B. 30° C. 38° D. 69° E. 26°
Each halogen atom, such as chlorine, fluorine, and bromine, in Earth's atmosphere contributes to
a. the production of carbon dioxide. b. the production of acid rain. c. the destruction of ozone over decades and centuries. d. the destruction of water in the upper atmosphere.
The blueness of the sky results from
a. preferential scattering of light by gas molecules. b. the lapse rate. c. the greenhouse effect. d. latent heat.