1. You are given 50 g of hot coffee (at 80 °C) but given that it is a hot day, you now want a cold coffee. What is the minimum amount of ice (in grams) that you must add
to cool the coffee to a temperature of 10 °C? Assume that coffee has the same specific
heat as water and neglect the heat content of the cup and heat exchanges with the
surroundings. The ice temperature is 0 °C. Given: water(3) — 37.6 J/(mol °C), Cwatert 1) =
75.4 J/mol °C), AH tus – 6.01 kJ/mol.
If the
ice comes
from a freezer at - 20 °C, would you expect to have to add more or
less ice to cool the coffee? Support your answer by doing the calculation.​

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?

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.