How much joules is 405,000 calories?

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

How is matter and energy cycle through a recycling system

Jack has 100 milliliters of a 12 molar solution of sulfuric acid. How much of it should he put into a graduated cylinder to make 20 milliliters of a 1.2 molar solution? I'm studying for asvab can someone walk me through the solution

How many liters of CO2 form at STP if 5.0 g of CaCO3 are treated with excess hydrochloric acid?

What is the relationship between temperature and altitude in the troposphere? As altitude increases, temperature decreases. As altitude increases, temperature increases. As altitude increases, temperatures remain the same.

What is the purpose of the scientific method? A. To make a guess in order to prove a hypothesis B. To provide a reliable answer to a specific question C. To remove any source of bias in an experiment D.

Given the balanced equation: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, what is the total number of moles of O₂ required for the complete combustion of 1.5 moles of C₃H₈?

What are substances called whose solutions conduct electricity?

How many atoms does sodium silulfide have?

Calculate the molar mass of Al (OH) 3.