Search & Filtering
On the laboratory shelf are 250mM solutions of both Acetic Acid and Sodium Hydroxide. How would you make a 100 ml solution of 25mM Acetate buffer of pH 5.50 using these stock solution?
To obtain pure lead, lead (II) sulfide is burned in an atmosphere of pure oxygen. The products of the reaction are lead and sulfur trioxide (SO3). Write a balanced chemical equation for this process. How many grams of lead will be produced if 2.54 grams of PbS is burned with 1.88 g of O2? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer.
A cup of coffee (100 g) cools from 90˚C down to comfortable room temperature 25.˚C. How much energy does it release to the surroundings?
1) run the blast furnace
2) roasting
3) run the oxygen converter
4) steel iron production
23.4 kJ to calories
#340153 on Dec 2023