1)What number of atoms of phosphorus are present in 1.43 g of each of the compounds listed?
2)Silver sulfadiazine burn-treating cream creates a barrier against bacterial invasion and releases antimicrobial agents directly into the wound. If 23.0 g of Ag2O is reacted with 46.0 g of C10H10N4SO2, what mass of silver sulfadiazine, AgC10H9N4SO2, can be produced, assuming 100% yield?
3)Chloral hydrate (C2H3Cl3O2) is a drug formerly used as a sedative and hypnotic. It is the compound used to make "Mickey Finns" in detective stories.
What number of chlorine atoms are in 5.7 g chloral hydrate?
4)Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes upon contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic microorganisms); and it foams upon contact with blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxide can be prepared by the action of an acid on an alkaline earth metal peroxide, such as barium peroxide.
BaO2(s) + 2 HCl(aq) H2O2(aq) + BaCl2(aq)
What mass of hydrogen peroxide should result when 1.35 g of barium peroxide is treated with 25 mL of hydrochloric acid solution containing 0.0275 g of HCl per mL?
What mass of which reagent is left unreacted?
5)Consider the following unbalanced reaction.
P4(s) + F2(g) PF3(g)
What mass of F2 is needed to produce 168 g of PF3 if the reaction has a 76.3% yield?
6)Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows.
Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g)
(Cu does not react with HCl.) When 0.5029 g of a certain brass alloy is reacted with excess HCl, 0.0901 g ZnCl2 is eventually isolated.
What is the composition of the brass by mass?
How could this result be checked without changing the above procedure?
7)Nitric acid is produced commercially by the Ostwald process, represented by the following equations.
4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g)
2 NO(g) + O2(g) 2 NO2(g)
3 NO2(g) + H2O(heart) 2 HNO3(aq) + NO(g)
What mass in kg of NH3 must be used to produce 5.0 * 10^6 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
please help im so lost on all of these