Given the reaction: 2C2H2(g) + 502(g) → 4CO2(g) + 2H2O(g)
What is the total number of grams of O2(g) needed to react
completely with 0.50 mole of C2H2(g)?

A)40 g
B)160 g
C)10 g
D)80 g

How does chemistry affect our world? a. chemicals makes our world more polluted. b. chemicals keeps us healthy. c. chemicals can or hurt our world. d. chemicals make our world safe to live in.

Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

Which substances have the lowest melting points: ionic covalent, or metallic