General Chemistry Answers

How long did it take for 100 mg of P-32 to decay until only 25 mg remain unchanged?

2𝑆𝑂3(g) ⇌2𝑆𝑂2(g) +𝑂2(g)

If the concentration of SO3(g) is increased,

the concentration of SO2 will ________ and the concentration of O2 will _____________

2𝑆𝑂3(g) ⇌2𝑆𝑂2(g) +𝑂2(g)

If the concentration of SO3(g) is increased,

the concentration of SO2 will ________ and the concentration of O2 will _____________

You were given ferrous sulfate by your doctor to help prevent iron deficiency anemia. The chemical formula of ferrous sulfate is FeSO4. How many moles are there in 115.45 g? (atomic mass: Fe = 55.85 AMU; S= 32.01 AMU; O=16.00 AMU)

The prevailing atmospheric in Manila is 0.95 atm. What is the pressure in:

a.) torr

b.) psi

 A tall unclothed athlete with a skin temperature of 34^oC stands in a dark room with a temperature o 23^oC. The athlete’s skin has a surface area of 1.7m². What is the rate of heat transfer via radiation from the athlete? (e_skin  = 0.97)

What volume (mL) of 0.70 M Sodium hydroxide (NaOH) is needed to

neutralize 270 mL of 0.40 M Sulfuric acid (H2SO4)?

2 NaOH + H2SO4 Na2SO4 + 2 H2O

What is the mass of 3.25 mol of Co? The molar mass of Co2 is 44.0 g/mol?

For the reaction attached below. What are the values of the equilibrium constants (Kp and Kc) if the pressure of CO2 is 0.384 atm at 500 degrees Celsius? 

Consider the reaction attached below. If the partial pressure of N2, H2, and NH3 are 1.3 atm, 0.83 atm, and 0.85 atm respectively, what is the equilibrium constant of the reaction in terms of partial pressure of the gases?