Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3). Which equation correctly represents this reaction? A. N + H → NH B. 2N2 + H2 → 3NH3 C. 2NH → N + 3H2 D. N2 + 3H2 → 2NH3

Choose the best answer to each question. Which has the most kinetic energy? a bowling ball with a velocity of 1.5 m/s Or a golf ball with a velocity of 0.5 m/s

A preliminary untested explanation that tries to explain how or why things happen in the manner observed is a scientific

Which of the following is a mixture? alcohol water mercury ink

How much sodium chloride (NaCl) would need to be added to 750 milliliters of water to make a 15% solution?

Which of the following is a polyatomic ion? O A N₂ B. HCl O C. S2 O D. PO43-

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.