Design an alcohol with six carbons, where the hydroxyl group is on the third carbon.

A chemist carefully measures the amount of heat needed to raise the temperature of a 197.0 g sample of a pure substance from \( 49.4^{\circ} \mathrm{C} \) to \( 67.7^{\circ} \mathrm{C} \). The experiment shows that 16.9 kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance? Be sure your answer has the correct number of significant digits.

A chemist carefully measures the amount of heat needed to raise the temperature of a 0.58 kg sample of a pure substance from \( 57.4^{\circ} \mathrm{C} \) to \( 67.4^{\circ} \mathrm{C} \). The experiment shows that \( 27 . \mathrm{kJ} \) of heat are needed. What can the chemist report for the specific heat capacity of the substance? Be sure your answer has the correct number of significant digits.

I nanotubi in carbonio sono strutture che possono avere una lunghezza di \( 0,000000015 \mathrm{~m} \). - Esprimi questa lunghezza in notazione scientifica.

При образовании 2,2г СО \( { }_{2} \) по уравнению реакции: \( \mathrm{C}(\mathrm{тв})+\mathrm{O}_{2}=\mathrm{CO}_{2}(\mathrm{r}) \) выделилось 19,7 кДж теплоты. Стандартная энтальпия образования \( \mathrm{CO}_{2}(\mathrm{r}) \) в кДж/ моль равна -197 +394 +197 \( -394 \times \)

If 82 g of sugar is dissolved in 7950 mL of water, what is the concentration of the solution?