A museum curator is most likely an art conservationist. They would have to determine the age an art piece was developed and ways to preserve older artefacts.

These processes would require the use of chemicals and physical tests, and also research laboratories.

<em>I hope this answer is helpful and clear.</em>

8 0

4 years ago

four students measured the mass of a piece of metal whose accurate mass is 34.75g. their result are 34.2g,33.75g,35.0g and 34.69

dedylja [7]

Answer:

the best estimate is 34.69 g

Explanation:

the best estimate is 34.69 gm because when it is rounded it becomes 34.70 gm which is near to actual weight 34.75 gms

4 0

3 years ago

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The formula for a buffer solution contains 1.24% w/v of boric acid. How many milliliters of a 5% w/v boric acid solution should

Yanka [14]

Answer:

248 mL of 5% w/v boric acid solution should be used to obtain the solution needed.

Explanation:

We can calculate the volume of the 5% w/v boric acid solution needed to prepare the buffer solution 1.24% w/v using the following equation:

$C_{i}V_{i} = C_{f}V_{f}$

Where:

$C_{i}$ : is the concentration of the initial solution = 5% w/v

$C_{f}$ : is the concentration of the final solution = 1.24% w/v

$V_{i}$ : is the volume of the initial solution =?

$V_{f}$ : is the volume of the final solution = 1 L

Hence, the volume of the 5% solution is:

$V_{i} = \frac{C_{f}V_{f}}{C_{i}} = \frac{1.24 \%*1 L}{5 \%} = 0.248 L = 248 mL$

Therefore, 248 mL of 5% w/v boric acid solution should be used to obtain the solution needed.

I hope it helps you!

6 0

3 years ago