A chemist wants to determine the enthalpy of neutralization for the following reaction: HCI (aq) + NaOH(aq) → NaCl (aq) + H2O (1)
The chemist uses a coffee cup calorimeter to neutralize completely 61.1mL of 0.543 M HCI with
42.6 mL of NaOH. The initial temperature of both solutions is 17.8°C. After neutralization, the
highest recorded temperature is 21.6°C. Calculate the Heat neutralization in kJ/mol of HCl. Assume that
the density and specific heat capacity of both solutions is the same as that of water.

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.