How many neutrons are in an atom of Mg-25?

What is the volume, in mL, of 0.50 moles of ammonia (NH3) at STP? A. 1120 L B. 22.32 mL C. 8500 mL D. 11,200 mL

What role do catalysts play in chemical reactions?

When bonding to form long chains, carbon is able to form?

What is the percent by mass of hydrogen in aspirin (c9h8o4) ?

Is the electron configuration 1s22s22p5 for Oxygen correct?

A syringe contains 589 mL of CO at 325 K and 1.2 atm pressure. A second syringe contains 473 mL of N2 at 298 K and 2.6 atm. What is the final pressure if the contents of these two syringes are injected into a 1.00 L container at 0.00°C?

Which pair of elements can form an ionic compound? A) Two atoms of hydrogen B) One atom of sodium and one atom of fluorine C) One atom of calcium and one atom of chlorine D) Two atoms of hydrogen and one atom of oxygen

Two members of the Boron family owe their names to bright lines in their emission spectra. Indium has a bright indigo blue line (451.1nm) and Thallium has a bright green line (535.0 nm). What are the energies of these two spectra lines?

Whats the answer to 7/2 * 1/5?

Which statement correctly describes the relationship between reactant and yield? The actual yield is calculated from the amount of the excess reactant present. The actual yield is calculated from the amount of the limiting reactant present.