Mol% TiO2 is mixed to 99.9 mol% Al2O3 and reacted to form a non-stoichiometric homogeneous solid solution. (3 pt)

(a) Write 3 defect reactions (all TiO2 atoms go into regular sites; all anions go into regular sites; all cations go into regular sites)

(b) Addition of TiO2 to Al2O3 generates defects. Calculate the net variation of mass for each of reactions in (a) in reation to perfect Al2O3 by considering the result of the defect reaction, e. g., Ti substituting for Al (gain of mass mTi – mAl =). Which reaction generates the highest net gain of mass ?

(c) For each defect reaction, write the chemical formula of the solid solution.

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, and calculate its density. here is a summary of the steps required: add water by clicking and holding prepare a known volume of water button. until the desired volume of water has been added. if more than the desired volume is added, click the reset button. button and redo the procedure. a single click will add about 21.0 ml of water. to set the mass, click and hold weigh out metal button. until the desired amount of metal is added to the weighing pan. once the desired mass of the metal is added, release the button. transfer the metal to water and then click on calculate density button. to see how the density is calculated using water displacement to measure the volume of the solid. to save time you can approximate the initial volume of water to â±1 ml and the initial mass of the solid to â±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? check all that apply.

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.