Chapter 1.7, Problem 8RQ

Which element is important in directly triggeringcontraction?a. sodium (Na+)b. calcium (Ca++)c. potassium (K+)d. chloride (Cl-)

A quantity of gas in a piston cylinder had a volume of 0.539 m^3 and a pressure of 200 Pa. the piston compresses the gas to 0.222 m^3 in an isothermal (constant-temperature) process. What is the final pressure of the gas?

Calculate the enthalpy of vaporization at the normal boiling point (760 mmHg) of the liquid(water, boiling point of 100 celsius).

Calculate the amount of heat released when 7.40g of water cools from 49c to 29c

Combustion of a fuel sample in a bomb calorimeter increases the temperature of the entire system by 5.10 °C if the calorimeter contains 1700 g of water, but only by 4.00 °C if the calorimeter contains 2200 g of water. What is the heat capacity of the dry bomb calorimeter assembly? Assume that the specific heat capacity of water is 4.18 J g–1 °C–1.

If 4.00 L of ethyl alcohol at 18.0 ⁰C is exposed to a temperature of 25.0 ⁰C, what is the resulting volume? (Alcohol: β = 1100x10⁻⁶ / ⁰C) * a. 4.03 L b. 4.31 L c. 0.308 L d. 0.0308 L

Using the figure, answer the following questions.a. What is the molar composition of the vapor in equilibrium with a boilingliquid that has a composition of 60% A and 40% B?b. A sample of vapor has the composition 50% A and 50% B. What is the composition of the boiling liquid that produced this vapor?

The distance between k and e would be approximately...  a) 6.25 cM b) 6.6 cM c) 4.65 cM d) 5.0 cM e) 11.65 cM