What masses of KCl and H2O are needed to make 250 g of 5.00 % solution? g of KCl
g of H2O

In pqr m< p=60 m< q= 30 and m

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

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?