How many moles of butane (C4H10) must be burned in an excess of O2 to produce 25 moles of CO2?2C4H10(g) + 13 O2(g) → 8 CO2(g) + 10 H2O(g) *

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

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Joan writes four numbers on the board in standard form, and then she writes their scientific notation