10. The formula of the carbonate ion is __________ ? a. CO2^2 b. CO3^2 C. CO3^3

Question

10. The formula of the carbonate ion is __________ ? a. CO2^2 b. CO3^2 C. CO3^3 d. CO2^2 e CO 11. Element X has three naturally occurring isotopes. The mass (amu) and % abundance of the isotopes arc 37.919 (5.07%), 39.017 (15.35%), and 42.111 (79.58%). What is the average atomic mass (amu) of element X? a. 41.42 b. 39.68 c. 39.07 d. 38.64 e. 33.33 12. Determine the mass (g) of Pbl2 produced in the complete reaction of 6.5g of KJ according to the following balanced equation: Pb(NO3)2 + 2KI right arrow Pbl2 + 2KNO3 a. 2.3 b. 9.0 c. 18 d. 36 e. 0.039

Explanation / Answer

ans: b ,   a,     b   respectively

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---