You placed exactly 4.35 g of brass into a calorimeter with 50ml of water and mea

Question

You placed exactly 4.35 g of brass into a calorimeter with 50ml of water and measured the temperature change. You repeated this two more times using the exact same amount of salt and water. If your Delta T values were 0.48 degree C, 0.53 degree C, and 0.59 degree C for each trial, what best describes your data? The C_p of brass is 3.8 times 10^-1 J/g middot degree C. The C_p of liquid water is 4.814 J/g middot degree C Accurate but not precise Precise but not accurate Neither accurate nor precise Both accurate and precise Which GHS pictogram would be most appropriate for a chemical that is a skin and eye irritant?

Explanation / Answer

1. c. Neither accurate nor precise

Accuracy is getting close to the true value. Precision is getting the same value in repeated measurements.

2. b. The exclamation mark (!) indicates that a chemical is eye and skin irritant

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