Which best describes H2 (g) + cl2 (g) - - > 2hci (g), h = - 184.6 kJ/mol?

A. the reaction has no activation energy.

B. the reaction is endothermic.

C. the reaction requires heat.

D. the reaction produces heat.

The polarity of the water molecule makes it the best universal solute.

All animals need oxygen gas (O2) for their primary cellular-level functioning. Inside the cell, O2 is split apart into oxygen atoms. Eventually, electrons that are flowing through the cell will be "received" by this oxygen.

What is the temperature of 0.750 mol of a gas stored in a 6,850 mL cylinder at 2.21 atm? Use PV = nRT and R-0.0821 Leatm molok: 2.95 K 5.24 K 138 K 246 K

How many hours of water interruption is considered an extended interruption

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

Which consequence of new fishing methods had the most immediate impact on the environment? A. Diesel engines on newer ships contributed to global warming B. Increased reliance on fish in the American diet led to health problems C.

Which statement best describes the basis of the band theory of metallic bonding? a. Molecular orbitals overlap to form atomic orbitals in which the valence electrons of the atoms travel. b.

Which of the following is always valid? Choose only ONE answer. 1. W = - P ∫ dV, for the calculation of work in a mechanically-reversible piston-cylinder arrangement 2. For any fluid undergoing a change in pressure, Cp = dH/dT. 3. ΔH = ΔU + Δ (PV) 4.

Are kilograms heavy?

What is the molarity of a solution containing 55.8 g of MgCl2 dissolved in 1 L of solution?