How many liters of .225 M Na2S solution would be required to react completely with 81.8 g Fe(C2H3O2)3? (The molar mass of iron (III) acetate is 233.00 g/mol.)

Which material burns faster? metal aluminum

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.