What would you use to measure an amount of solid sodium chloride(NaCl) crystals to add to a 30 mL solution? A. 10 ml graduated cylinder.
B. Scale that can weigh up to 250 lbs.
C. Triple Beam Balance that measures to the nearest 0.1 grams.
D. Spectrophotometer that measures between 100 and 900 nanometers.

Option C, Triple Beam Balance that measures to the nearest 0.1 grams

Explanation:

A Triple Beam Balance can measure  mass of substances very accurately

For this case,  a measurement device is required which can measure the mass of small quantity of salt for dissolving in 30 ml of solution.

A graduated cylinder measure volume so this would not help. A Spectrophotometer measures the intensity of light so this would not help. A Scale that can weight up to 250 lbs would not work for this case as small weight is to be measured.

Option D would be correct