Which of the following is the function of the atomiser in the emission system of Atomic Absorption Spectroscopy? To split the beam into two To break the steady light into pulsating light To break large mass of liquid into small drops To reduce the sample into atomic state

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

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: \( \mathrm{C}: 12, \mathrm{O}: 16, \mathrm{H}: 1 \)

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

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.

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.