If the following reaction: NO(g) + 1/2O2(g) --> NO2(g)
has the following enthalpy change:
H° = -56kJ/mol
What is the enthalpy of the decomposition reaction of 2 moles of NO2?
A. 112 kJ
B. -112 kJ
C. -56 kJ
D. 56 kJ

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

Based on the formulas, select the compounds below that are covalent: kbr sif4 al2o3 co2 naco3 s7o2 pcl3 fe3n2 h2o s2f10

What is the chemical name of the compound k2so4?