Combustion of an unknown hydrocarbon produces 0.954 mole CO2 and 1.27 mole H2O. what is the emperical formula of the unknown?

A solid substance tums into a liquid. Which best describes this change? A substance that has a specific volume changes to a substance that has a specific shape.

You have 10 ml of ethanol and want to use it all to make a 10-fold dilution with water. How would you do this, including the final volume? Show your calculations and give complete instructions.

Suppose that 2.14 grams of H2SO4 is mixed with enough water to make 225 mL of solution. Determine the Molarity (M) of the solution. (For this Schoology answer, you do not need to put H2SO4 after the answer, but you always need sig. figs and units!)

Select the correct answer. Which phrase correctly describes temperature? A. average rotational kinetic energy of the particles in an object B. C.

Is methane soluble in water?

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

How are amounts of hydrogen and oxygen gas made from the electrolytic decomposition of water related to the chemical formula of water?

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2 (l) → 2H2O (l) + O2 (g) ΔH = - 196 kJ Calculate the value of q (kJ) in this exothermic reaction when 3.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.