49 After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?

(1) 3.0 h (3) 12 h (2) 9.6 h (4) 24 h

Describe the electrolysis of molten lithium chloride to produce lithium and chlorine gas.

For the reaction 6 Li + N2 → 2 Li3N, what is the maximum amount of Li3N (34.8297 g/mol) which could be formed from 14.18 mol (6.941 g/mol) of Li and 16.37 mol of N2 (28.0134 g/mol) ? Answer in units of mol.

Explain what makes one mineral so precious or costly compared to another.

Which is true about sugar dissolving in water? Both sugar and water are solvents. Both sugar and water are solutes Sugar is the solvent and water is the solute. Sugar is the solute and water is the solvent.

What factors increase the likelihood that a volcanic eruption will be explosive? Group of answer choices a. High viscosity magma and high gas content. b. Low viscosity magma and high gas content. c. High viscosity magma and high water content. d.

Which of the following is a mixture A aluminum B BaSO3 C Milk D table salt

Which of the following quantum number combinations is not allowed in an atom? A. n = 2, l = 1, mr = - 1 B. n = 1, l = 1, m = 0 C. n = 8, l = 5, m = - 4 D. n = 6, l = 3, m = 2

13. Adding thermal energy to a gas at constant pressure will cause

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?

How do you find the ph of water