[考題] 103臺北市國中理化 Q.50
50. 設太陽表面溫度為6000K,表面氫氣壓力為5.0×10-3大氣壓,試問太陽表面處每立
方公尺的體積內約有幾個氫原子?
(A)3.1×1021 (B)6.2×1021 (C)9.3×1021 (D)1.24×1022
原答案為(B)
可我算出來是(D)
PV=nRT
P=5.0×10-3大氣壓
V=每立方公尺=1000公升
R=0.082
T=6000K
5.0×10-3×1000 = n×0.082× 6000
n=5/492 mol的氫氣
題目要算氫原子個數
所以氫原子個數= 2 ×(5/492)×6.02×10的23次方=1.24×10的22次方
請問我有算錯嗎??
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