2C2H6 (g) + 7O2 (g) → 4CO2(g) + 6H2O (g) ΔH = -1560 kJ
How many grams of ethane (30.07 g/mol) need to react to produce 461 kJ of heat?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Which statement best explains the relationship between an area is geography and the temperature of its surface water