During an experiment, a student adds 0.601 g of calcium metal to 150.0 mL of 1.65 M HCI. The student observes a temperature increase of 13.0 °C for the solution. Assuming the solution's final volume is 150.0 mL, the density is 1.00 g/mL,
and the specific heat is 4.184 J/(g.°C), calculate the heat of the reaction, AH X
Ca(s) + 2 H+ (aq)
Ca2+ (aq) + H2(g)

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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the ratio of the conjugate base to the acid required to attain the desired ph.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.