The complete combustion of ethanol, c2h50h (fw = 46.0 g/mol), proceeds as follows: c2h50h (l) + 3 02 (g) - --→ 2 c02 (g) + 3 h20 (l) llh = - 555 kj what is the enthalpy change for combustion of 4.0 moles of c2h50h?

How many total atoms are in 0.260 g of P2O5?

How does temperature affect the rate of a reaction? A. Increasing the temperature decreases the potential energy of the reactants. B. Increasing the temperature gives the molecules more kigetic energy C.

Assume that a section of double stranded DNA contains 100 base pairs. if 40 of the pairs contain baseC how many of the pairs would contain base A?

An ideal gas in a sealed container has an initial volume of 2.55 L. At constant pressure, it has cooled to 16.00 degrees Celcius where its final volume is 1.75 L. What was the initial temperature?

What happens when a hydrocarbon combusts? O A. It reacts with oxygen to produce carbon dioxide, water, and heat. B. It reacts with carbon dioxide to produce oxygen, water, and heat. O c.

A cells that carry information through tour nervous system

True or False: According to the present atomic theory, the location of an electron in an atom is best represented by a probability cloud.

How can we measure the density of different wooden objects

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic. True or False?

Which of the following equilibria would be impacted by a change in pressure? Select the correct answer below: H2 (g) + I2 (g) →2HI (g) NO (g) + O3 (g) →NO2 (g) + O2 (g) 2SO3 (g) →2SO2 (g) + O2 (g) CO (g) + H2O (g) →CO2 (g) + H2