Explain the following: Weigh approximately 5 grams of NaCl to the nearest milligram.
I've got an answer, but I'm just not sure if I answered it right. It just seems to simple to me. How would you answer this?
2007-08-26 06:13:07 · 5 answers · asked by Cole 2 in Science & Mathematics ➔ Chemistry
They're talking about error margins. No scale that you can use is going to be 100% accurate. Plus your hands are going to shake a little.
So 5 grams = 5000 milligrams. Depending on how many digits your scale is accurate to, maybe your scale will read 5.1 or 5.01 or 5.001 or 5.001 or 5.0001, etc. In this case, 5.001 would be to within a milligram, but in practice, that's going to be tricky if your hand shakes ;)
Does that help?
2007-08-26 06:22:06 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A miligram is 1 / 1000 of a gram. So you need to have a balance that can measure a mass with at least 3 digits after the decimal point.
2007-08-26 06:17:22 · answer #2 · answered by reb1240 7 · 1⤊ 0⤋
1g = 1000 mg
5g = 5 x 1000 mg = 5000mg
2007-08-26 06:19:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Sounds like you should measure to at least to 3 decimal places. For example, "5.012g". Hope this helps.
2007-08-26 06:20:46 · answer #4 · answered by Chris H 2 · 0⤊ 0⤋
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2016-05-18 02:25:32 · answer #5 · answered by ? 3 · 0⤊ 0⤋