Identify each of the substances in the following chemical reactions as acting as an "acid" or a "base."NH3 + H2O ? NH2- + H3O+
What will be an ideal response?
From left to right: acid, base, base, acid.
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When air temperature increases, which of the following happens to the saturation vapour pressure?
A. It remains the same. B. It keeps increasing and decreasing. C. It increases. D. It decreases.
Which of the following is a recognizable characteristic of recent calderas?
A) Steep-sided basin-shaped depression B) Large, conical mountain form C) Long, narrow valley
What radioactive isotope is generally used to fuel a controlled nuclear chain reaction?
A. uranium 235 B. barium 140 C. cesium 137 D. uranium 95
Annual U.S. hail frequency is greatest
A. in Southeastern states like North and South Carolina. B. in northern High Plains states like North and South Dakota. C. in Pacific Northwest states like Washington and Oregon. D. in southern High Plains states like Oklahoma and Kansas.