What r the safety measure to take in chemistry lab while doing an experiment ​

What is the percentage composition of carbon in the compound ch4

Word equation for k(s) +h2o(l) yield koh (aq) + h2

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.