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

A partir de la siguiente ecuación de combustión de octano, si reaccionan 59.2 gramos de octano, ¿Cuántos gramos de Oxígeno se necesitan? \[ \mathrm{C}_{8} \mathrm{H}_{18}+25 / 2 \mathrm{O}_{2}-->8 \mathrm{CO}_{2}+9 \mathrm{H}_{2} \mathrm{O} \] Considera: \( \mathrm{C}: 12, \mathrm{O}: 16, \mathrm{H}: 1 \)

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.

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 \( -394 \times \)

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

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