calCULATE THE APPROXIMATE VOLUME OF WATER THAT MUST BE ADDED TO 250ML OF 1.25N SOLUTION TO MAKE IT 0.500N?

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?

In which of the following phases of matter do molecules have the highest amount of energy? a. liquid b. gel c. solid d. gas

What sources of error may have contributed to the percent yield not being 100 percent? think about things that may have led to inaccurate measurements or where mass of the product could have been lost if this experiment was conducted in a physical laboratory.