How many moles of sulfur are present in 3.0 moles of Al2(SO2)3 ? Group of answer choices

1.0 moles of sulfur

9 moles of sulfur

3 moles of sulfur

10 moles of sulfur

What is the percent by mass of oxygen in fe2o3

What substance has a mass of 9.5g and volume of 2.1cm^3

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?