Why are unused chemicals never returned to thier original containers?

What are the effects of convection currents in our surroundings?

Which of the following is the correctly balanced chemical equation for the reaction of Ca (OH) 2 and HNO3? Ca (OH) 2 + HNO, → Ca++NO; Ca (OH) 2 + 2HNO, → 2H2O+2NO- Ca (OH) 2 + 2HNO, →H, O+CaNO, Ca (OH) 2 + 2HNO, → 2H2O + Ca (NO3) 2

The chart shows the time, initial velocity, and final velocity of three riders. A 4-column table with 3 rows. The first row labeled rider has entries Gabriella, Franklin, Kendall. The second row labeled time with entries 10 seconds, 8.

For which compound does 0.256 mole weigh 12.8 g? A) (C_2 H_4 O) B) (CO_2) C) (CH_3 Cl) D) (C_2 H_6) E) None of these

Which of the following is a monatomic anion? a) NH4+ b) Fr+ c) SO42- d) F-

What process is a physical change

For a half-reaction in an acidic solution, which substances should you add to balance the equation? A. H + and H20 B. H + and OH- C. H20 and NO2 D. OH-

What is the molar mass of mgf2

Hydrogen's sole electron occupies the 1s orbital but can be excited to the 4p orbital. List all the orbitals this electron might occupy on its way back to its ground state.

For the process 2SO2 (g) + O2 (g) Right arrow. 2SO3 (g), Delta. S = - 187.9 J/K and Delta. H = - 198.4 kJ at 297.0 K are known. What is the entropy of this reaction? Use Delta. G = Delta. H - TDelta. S.