What is the percent by weight of sodium in sodium sulfate (na2so4)? (the molar mass of na = 22.99, s = 32.07, and o = 16.00.) 16.18% 22.58% 32.37% 45.05% 51.17%

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.

What are some natural measures of time