General Chemistry Answers

How do we overcome the Activation NRG requirements for the RXN?

Silver tarnishes in the presence of hydrogen sulfide and oxygen according to the below reaction.

How many liters of O2 at 100.˚C and 115 kPa would be needed to react with 10.00 grams of silver?

4Ag + 2H2S + O2 —> 2Ag2S + 2H2O

Which of the following salts would be more soluble in acidic solution than in neutral water?

PbI2

Li3PO4

AgCl 

SrSO4

CuBr

Consider the reaction 4PH3(g) = P4(g) + 6H2(g)

Suppose that at a particular moment during the reaction, molecular hydrogen is being formed at the rate of 0.078 M/s.

(a) at what rate is P4 being formed?

(b) at what rate is PH3 reacting?

 LINDERA  what is this

Aqueous hydrobromic acid HBr

 reacts with solid sodium hydroxide NaOH

 to produce aqueous sodium bromide NaBr

 and liquid water H

2

O

. If 11.2

g

of sodium bromide is produced from the reaction of 26.7

g

 of hydrobromic acid and 17.6

g

 of sodium hydroxide, calculate the percent yield of sodium bromide. 

Round your answer to 3

 significant figures

By titration it is found that 114.3 mL of 0.562 M NaOH is needed to titrate 48.0 mL of HCl. What is the concentration of the HCl in molarity? 

A 25.0 mL solution of Ba(OH)₂ is neutralized with 31.5 mL of 0.250 M HBr. What is the concentration of the original Ba(OH)₂ solution?

What is the volume of a gas if the pressure is 3 atm, the number of moles is 3, the temperature is 300 K and the Universal Gas Constant is 0.0821

An aerosol can is at a pressure of 8.7 atm at a temperatue of 88.0 C. It is then placed in a fire and the pressure rises to 20.8 atm. What is the temperature of the fire? Express your answer in degrees celcius, C.