A sample of an unknown substance contains 1.0 grams of copper and 0.558 grams of chlorine, while a different sample of that same substance contains 2.0 grams of copper and 1.116 grams of chlorine. Which law does this observation demonstrate

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

Which formula can be used to calculate the molar mass of hydrogen peroxide

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i