It has been raining all day and the temperature is expected to freeze tonight. Mrs. Gussman treats her front steps with sodium chloride (NaCl). This results in a water and salt solution with a freezing point that is lower than pure water. If 850 grams of sodium chloride is added to 6.10 kilograms of water, what will be the freezing point for this solution? The freezing-point depression constant for water is Kf = –1.86°C/m. In solving this problem, consider that sodium breaks into Na+ and Cl– ions, doubling the molar concentration of the salt.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.