1.36 moles of an unknown ionic compound is dissolved in 50.0 mL of water in a coffee cup calorimeter.  The water is initially at 5.13°C, and the final temperature of the water after the ionic compound has fully dissolved is 8.21°C.  Calculate DHsoln in kJ/mol of ionic compound.  The density of water is 0.997 g/mL.  Assume that the final solution is dilute enough to have the same density and specific heat capacity as pure water.

75.0 grams of solid sodium hydroxide is dissolved in 1.000 L of 20.0°C water in a coffee cup calorimeter.  If the final temperature of the water is 40.0°C, calculate DHsoln for NaOH, in kJ/mol NaOH. Show all work, and highlight your answer in a readable background color.  Assume that the solution is dilute such that it has the same density and specific heat capacity of pure water.  

What is the volume (in L) of 7.11 moles of carbon dioxide gas at 2.93 atm and 56.1°C?

A container contains a gas mixture of 1 mol Ar, 1 mol Kr, and 1 mol He at 25°C.  Which gas particles have the highest average velocity?

Which of the following developments contributed most directly to the conditions described in the excerpt?

In his statement, Truman had the goal of

Answer the following questions in English. 1. At about what time of day did this conversation take place? How do you know? 2. Are Andrea and José currently in Venezuela? How do you know? 3, What is José’s reaction when he learns about the Venezuelan population in the school?  

You have decided to study abroad in Mexico next year. Your professor has recommended a great university and has suggested that you live with a host family. Part I: Interpretive Reading Before you choose your host family, you will have to learn about families in Latin America. Take a look at the infographic below and respond to the questions that follow: Mark each detail that is mentioned in the document. Not all are included. 

The groups described in the excerpt most likely opposed

Which of the following historical developments could best be used as evidence to support McGirr’s argument in the excerpt?