What coefficient of O2 is needed to balance the equation C3H8 + O2 - > 3CO2 + 4H20?

a. 2

b. 3

c. 5

d. 6

Consider the balanced equation below. 4NH3 + 3O2 - > 2N2 + 6H2O What is the mole ratio of NH3 to N2? 2:4 4:2 4:4 7:2

Is evaporation of water a physical or chemical change

The rate constant for the decomposition of acetaldehyde, CH₃CHO, to methane, CH₄, and carbon monoxide, CO, in the gas phase is 1.32 ✕ 10⁻² L/mol/s at 707 K and 3.20 L/mol/s at 851 K. Determine the activation energy (in kJ/mol) for this decomposition.

How many moles of glucose (C6H12O6) are in 1.5 liters of a 4.5 M C6H12O6 solution

What can be determined if only the atomic number of an atom is known? (1) the total number of neutrons in the atom, only (2) the total number of protons in the atom, only (3) the total number of protons and the total number of neutrons in the atom

What is it called when copper can be stretched into s thin wire?

What river basin provide river water to charolette and gastoia?

8. Calculate the molar mass of an alkane with the mole- cular formula C H18.

What is DNA? What information does it carry? Where is DNA located?

5. Differences in which property allow the separation of a sample of sand and seawater by filtration? A) concentration of ions B) volume of sample C) mass of sample D) particle size