What evidence is there that a chemical reaction is occurring in dropping an alka seltzer tablet into a glass of water

A compound has an empirical formula of CH20. What is its molecular formula, if its molar mass is 180 g/mol? (C=12.01 amu, H=1.008 amu, O=16.00 amu)

The combustion of Ibuprofen C13H18O2 produces water and carbon dioxide, I 100.0 g of Ibuprofen is combusted, how much carbon dioxide is produced?

Which of the following is the test for oxygen has? A. a glowing wooden splint is placed in the gas B. a lit wooden splint is placed in the gas C. the gas is bubbles into limewater D. damp blue litmus is placed in the gas

In this redox reaction, identify the reducing agent. 2Li + F2 2LiF

With a quick, sudden motion, he bends his thumb forward so that the rubber band slips off. What happens next?

What two chemical mechanisms change pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex? Group of answer choices a) Decarboxylation and condensation. b) Oxidation and decarboxylation. c) Condensation and dehydrogenation.

Which earth cycle does the suns energy drive

How many moles are in 10 grams of CaCl2?

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a subscript of 5 indicates five Cl atoms P5Cl because a subscript of 5 indicates five P atoms P5Cl3 because a subscript of

Why are the elements in groups 3 to 12 often used to make dyes?