to 0btain 3 grams of NaCl, a student places a weighing piece of paper on a balan

Question

to 0btain 3 grams of NaCl, a student places a weighing piece of paper on a balance and presses the tare button. then the student adds NaCI until the balance reads 3.0000 grams select the statement that best describes the mass of the sample.
      which is the best choice?
1.
The mass of the sample that should be recorded is less than 3.0000 grams
2.
The mass of the sample that should be recorded as more than 3.0000 grams
3.
The mass of the sample that should be recorded is 3.0000g
4.
The mass of the sample that should be recorded as close to but not exactly 3.0000g

Explanation / Answer

The correct answer is Option 1

Since the weighing balance shows the mass of NaCl + mass of paper which is exactly 3 grams

mass of NaCl = 3 - mass of paper

Hence the mass of NaCl sample that is recorded will be less than 3 grams

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