Which equation shows conservation of mass and energy for a reaction at 101.3 kpa and 298 k?

a. 2h2 (g) + o2 (g) 2h2o (g) + 483.6 kj

b. 2h2 (g) + o2 (g) 2h2o (l) + 285.8 kj

c. h2 (g) + o2 (g) h2o (g) + 483.6 kj

d. h2 (g) + o2 (g) h2o (l) + 285.8 kj?

What's the ratio of 80% hydrogen

B). How many mole of mercury (Hg) would be produced from reacting 6 mole of Hgo (mercury (II) oxide) ?

How does the human body keep warm on a cold day?

As the number of effective collisions between reacting particles increases, the rate if a chemical reaction: A - increases B - decrease C - remains the same

Classify each of the following as an exothermic or endothermic reaction: 1) 2H2 (g) + O2 (g) ⟶Δ2H2O (g) + 483.6kJ 2) 6CO2 (g) + 6H2O (l) + 15000kJ⟶C6H12O6 (aq) + 6O2 (g) 3) 2Al (s) + Fe2O3 (s) ⟶Al2O3 (s) + 2Fe (s) + 850kJ

Is the Sun bigger and brighter than Betelgeuse?

What is the si unit for the quantity of particles in a sample?

How many moles of ammonia are produced when 8 moles of nitrogen gas react with hydrogen gas?

If a mass of gas is confined in a closed container with a movable piston above the gas and a small downward force is applied to the piston, the volume of the gas will be a. increased considerably. b. reduced considerably. c. reduced slightly. d.

If an atom has 8 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration?