PLEASE HELP ME IM GIVING 30 POINTS Assignment: Draw up variants of options with which you can make the following changes:
In each reaction, the names of the products and the type of reaction appear.
• Hydrochloric acid → copper (II) chloride → copper (II) hydroxide → copper (II) oxide
• Fe → Fe2O3 → X → BaSO4
• S → X → Na2SO3 → CaSO3

219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c → fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.