Atomic and mass numbers of resultant atom

Question

Assignment:

Q1. True or false

A. All compounds that contain hydrogen are acids.

B. A solution with pH 5 has 10 times higher [H⁺] than a solution with pH 6.

C. SO₃ in the atmosphere is one cause of acid rain.

D.  Agricultural fertilizers are not a cause of water pollution.

E.  One function of an auto catalytic converter is to convert CO to CO₂

F.  In two half lives a radioactive isotope is completely gone.

G  Beta radiation from an atom is emission of a valence electron.

H. In the same size container at the same temperature, 25g of N₂ gas

Has the same pressure as 25g of NH₃ gas.

I.  Chlorofluorocarbon compounds are considered to be a prime cause of ozone depletion in the stratosphere.. 

J.  The two elements in greatest amount in air are N₂ and O₂ .

Q2. A water solution has 1.00x10^-3 moles of H⁺ in 10.0L of solution.

A. What is the [H⁺] ?  

B. What is the pH ? 

C. What is [OH^-] ?

D.Is the solution acidic or basic?

Q3. Explaining the reasons for your answers:

A. Why is a solution of SO₃ in water acidic?

B. Why is a solution of MgO in water basic?

Q4.  A. An isotope with atomic number 89 and mass number 225 emits an alpha particle. What are the atomic and mass numbers of the resultant atom?

B. An isotope with atomic number 74 and a mass number of 188 emits a beta particle. What are the atomic and mass numbers of the resultant atom?

Q5. What is the pressure in atmospheres of 125 grams of N₂ gas in a 12.0L container at 25.0^oC ?

Q6. Why is HCl termed a "strong acid" and CH₃COOH termed a "weak" acid?

Q7. How many grams of NaOH are contained in 825mL of a 0.400 molar solution?

Q8. 2C₈H₁₈ + 25O₂ " 16CO₂  + 18H₂O. How many liters of CO₂ gas result at 0.950atm and 25.0^oC when 525g of C₈H₁₈ react ?

Q9. Person A has well water with 0.011ppm (parts per million) of Pb²⁺ Person B has well water with 6.5x10^-5 grams of Pb²⁺  in 5.00L Which person has well water with the lower concentration of Pb²⁺ ? Clearly explain the reason for your answer.

Q10. 975 atoms of an element with a half life of 4.50 seconds are synthesized. How many of the atoms remain

A. After 9.00 seconds?

B. After 13.50 seconds?

Provide complete and step by step solution for the question and show calculations and use formulas.