ammonia (NH3 (g) Hf=-45.9 kJ/mol) reacts. with oxygen to produce nitrogen and water (H2O (g) Hf = - 241.8 kJ/mol according to the equation below. 4NH3 (g) + 3O2 (g) - --> 2N2 (g) + 6H2O (g) what is the enthalpy of the reaction

Balance these equations N2 + O2 > NO

The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?

Ernest Rutherford discovered that atoms were mostly: Negatively charged Positively charged Electrons Empty space

What type of ions have names ending in - ide a. only cations b. only metal ions c. only anions d. only gaseous ions

Which type of seismic waves produces the largest ground movement?

What are the reactants and products? Write a reaction equation and label the reactants and products.

What is the best definition of "thinking at the margin"? * O Deciding to use the entire piece of paper O Deciding whether or to do or use one additional unit of resource O Thinking about how to get the most work done O Thinking about how to get the

How many liters of radon gas would be in 3.43 moles at standard temperature and pressure (273 K and 100 kPa) ? A. 100 L B. 76.83 L C. 6.53 L D. 6.99 L

Which of the following equations describes a single-replacement reaction? A. 2N2O5 (g) = O2 (g) + 4NO2 (g) B. 2Na (s) + Cl2 (g) = 2NaCl (s) C. Cl2 (g) + 2Kl (s) = 2KCl (s) + l2 (g) D. H2 (g) + Br2 (g) = 2HBr (g)

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.50*1015Hz1.50*1015Hz? Express your answer in joules to three significant figures.