What type of reaction is: ch4 + 2o2 → co2 + 2h2o + 218 kcal? an exothermic reaction a combination reaction a decomposition reaction an endothermic reaction a single replacement reaction?

What's the four things that can happen to sound waves when they reach a barrier?

Lowering vapor pressure example

Bromine has the atomic number 35. Bromine atoms often have 36 electrons, making them have this overall charge: A. - 1 B. + 1 C. - 2 D. + 2

What is the maximum volume of 0.25 M sodium hypochlorite solution (NaOCl, laundry bleach) that can be prepared by dilution of 1.00 L of 0.80 M NaOCl?

during which step of the scientific method does a scientist make an educated guess about the outcome of an experiment

Would the two as yet undiscovered elements A+1 and D+2 react?

Ammonium perchlorate is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen gas, chlorine gas, oxygen gas and water vapor, releasing a great deal of energy.

Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SeCl2.

The same amount of energy is required to remove each electron sequentially from an atom. A. TrueB. False

Crude oil may contain hundreds of different types of hydrocarbons. Some examples include: Butane (C4H10) Dodecane (C12H26) Octane (C8H18) Benzene (C6H6) Many common fuels, such as gasoline and kerosene, are combinations of these substances or others.