What happens when elements chemically combine?

A.) All elements retain their original properties

B.) New properties are former

C.) Only metals retain their original properties

D.) New elements are formed

What type of symbolic relationship do a bat and cow have?

What are the sign of a chemical change and the sense you might use to detect it.

A sample of an ideal gas at 15.0 atm and 10.0 l is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. calculate the work in units of kj for the gas expansion.

Draw the reaction that would transform 3-methylbutan-1-ol to 3-methylbutanoic acid.

By titration it is found that 49.3 ml of 0.151 m naoh (aq) is needed to neutralize 25.0 ml of hcl (aq). calculate the concentration of the hcl solution.

Which best describes the molecules of an ideal gas

MgNH4PO4> Mg2P2O7+NH3+H2O

If 1.0 gram of matter was converted to energy, how much energy would be formed? A. 9.0 x 10-13 joules B. 9.0 x 1013 joules C. 3.0 x 1013 joules D. 3.0 x 108 joules

A piece of metal ore weighs 8.50 g. when a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 ml to 26.47 ml. what is the density of the ore?

Find the mass of 3.65 x 10^-2 mol K2SO4