Ammonia (NH3 (g), Hf = - 45.9 kJ/mol) reacts with oxygen to produce nitrogen and water (H2 O (g), Hf = - 241.8 kJ/mol) according to the equation below. What is the enthalpy of the reaction?

1) - 3,572.1 kJ

2) - 1,267.2 kJ

3) 1,267.2 kJ

4) 3,572.1 kJ

A student measures the mass of a beaker filled with corn oil. the mass reading averages 215.6 g. the mass of the beaker is 110.4 g. a. what is the mass of the corn oil? b. what is the density of the corn oil if its volume is 114 cm3?

A body travels 10 meters during the first 5seconds of its travel and it travels a total of 30 meters over the first 10 seconds of its travel what is its average speed during the time from t=5 seconds to t=10 seconds

The unsaturated hydrocarbon butadiene (C4H6) dimerizes to 4-vinylcyclohexan (C8H12). When data collected in studies of the kinetics of this reaction were plotted against reaction time, plots of [C4H6] or ln[C4H6] produced curved lines, but the plot

how many atoms of silver would be produced if 100 grams of copper reacts with an excess of silver nitrate Cu + 2 AgNO3 - > Cu (NO3) 2 + 2 Ag

A sample of the radioisotope potassium-40 is crushed to increase its surface area. The temperature of the sample is then lowered 25°C. What affect do these changes have on the rate of nuclear decay? A.) The decay rate doubles B.

How many valence electrons are in each atom?

77.60 ml of. 210 M NaOH are required to neutralize 25.05 ml ofH2SO4 solution in a titrationexperiment. Calculate the molarity and normality of theH2SO4 solution.

A 25.0 g bold made of an alloy absorbed 250 J of heat as its temperature changed from 25.0 °C to 78.0 °C. What is the specific heat of the alloy?

How is an areas topography determined?

How to put a solution back into solution when it comes out of solution chemistry?