Which of the following is correct? 1. The principal quantum number, n, describes the shape of an atomic orbital.
2. No more than two electrons in an atom can have the same principal quantum number (n).
3. The magnetic quantum number, m, is related to the orientation in space of an orbital within a given subshell.
Select one:
O a. 1 only
O b. 2 only
O c. 3 only
O d. 1, 2, and 3
e. Not enough information

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas