What is the standard enthalphy change ΔHo, for the reaction represented above? (ΔHof of C2H2 (g) is 230 kJ mol-1; (ΔHof of C6H6 (g) is 83 kJ mol-1; )

Having difficulty understanding formulas involved. Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O.

100 g of an inorganic compound X. 5H2O containing a volatile impurity was kept in an oven at 150 degree celcius for 60 minutes. the weight of residue after heating is 8g. the percentage of impurity in X was?

The vapor pressure of ethanol at 25°C is 7.828 kPa. Calculate the vapor pressure in atm.

According to the law of mass action, what must be equal at equilibrium?

Is it chemical or physical change sugar dissolving in tea

At room temperature and pressure what is the volume of one mole of oxygen?

Ibuprofen, a common pain remedy, has an empirical formula of C7H9O and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?

Copper (cu) is a transition element used in the making of coins. calculate the mass in grams of 0.0420

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.

A chemist must prepare of aqueous potassium permanganate working solution. He'll do this by pouring out some aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water.