Which of the following best describes exothermic chemical reactions?

What is the daughter nucleus (nuclide) produced when 64cu undergoes beta decay by emitting an electron? replace each question mark with the appropriate integer or symbol?

A 1.2-liter tank at a temperature of 27°C contains a mixture of 1.5 moles of oxygen, 1.2 moles of nitrogen, and 1.6 moles of hydrogen. What is the total pressure of the mixture inside the tank? (R = 0.08205 L atm/K mol)

Identify the number of core and valence electrons for each atom. Xe : core electrons Xe : valence electrons Ca : core electrons Ca : valence electrons Br : core electrons Br : valence electrons

Which is another name for groups of elements

When the temperature of air rises, the amount of water needed for saturation A. increases. B. decreases. C. stays the same. D. increases until it reaches a certain temperature, then drops.

The temperature of a substance is a measure of the average Select one: a. attractive forces between its molecules b. mass of its molecules c. potential energy of its molecules d. kinetic energy of its molecules

Which molecular geometry is least likely to occur with sp3 hybridization? tetrahedral trigonal planar bent trigonal pyramidal

The number of moles in 118.0g of calcium chloride

You should be worried about the safety of a healthcare product if you see which of the following claims made? a. FDA approved! b. Miracle cure! c. Scientifically tested! d. Effective in double-blind study!

Which branch of science provide the proof that earth is approximately 4.6 billion years old