Choose all of the chemical reactions which correctly show that chemical reactions must obey the law of conservation of matter. ch4 + 2o2 → co2 + h2o h2 + o2 → h2o c6h12o6 + 6o2 → 6co2 + 6h2o 2co + o2 → 2co2 4p + o2 p4o10

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.