How many atoms of hydrogen are in 0.56 mol of (NH4) 2SO4

Which of the following is the correct definition of chemical energy? A. energy an object has because of its motion or position B. energy resulting from the flow of charged particles, such as electrons or ions C.

Extra Practice ... 1) What is the speed of light?

The second law of thermodynamics states that: A. the energy of the universe is constant. B. the entropy of the universe is constant. C. the entropy of the universe is increasing. D. the energy of the universe is increasing. E.

How many moles of NaCl (s) can be formed from 32 moles of Cl2 (g) reacting with an excess of Na (s) ?

Over time a hypothesis that is supported by many experiments and much data becomes a

A student makes ice cream using an old-fashioned hand-crank machine. He does 40 joules of work each time he turns the crank in a complete circle. The crank handle makes a circular path with a diameter of 0.5 meters.

Which statement is true about molecules and compounds? Question 7 options: Both are made of two or more elements. Both are made of only one element. Both are made of only one kind of atom. Both are made of two or more atoms.

Which reaction is endothermic? H2 (g) + ½ O2 (g) → H2O (g), ΔH = - 57.82 kcal ½N2 (g) + O2 (g) + 8.1 kcal → NO2 (g) ½N2 (g) + 3/2H2 (g) → NH3 (g) + 11.0 kcal C (diamond) + O2 (g) → CO2, ΔH = - 94.50 kcal

If a temperature increase from 10.0 ∘C to 21.0 ∘C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction

Chlorine released from chlorofluorocarbons (cfcs) reacts with ozone in the atmosphere to form oxygen. the proposed reactions are cl (g) + o3 (g) →clo (g) + o2 (g) clo (g) + o (g) →cl (g) + o2 (g) identify the species that acts as a catalyst and the