Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d11 4p4?

If a metal changes color over time from exposure to air, what has likely occurred? a) a chemical change b) a reversible change c) a change of state d) a physical change

How many molecules are present in each sample?8.55 mol SO2 : molecules SO2 0.603 mol CO : molecules CO a sample of NH3 containing Avogadro's number of molecules:molecules NH3

Which substance is a homogeneous mixture? A: Cereal B: Silver C: Nickel D: Shampoo

What's is the mass in grams of 5.90 mol C8H18?

Consider the reaction of CaC2 and water to produce CaCO3 and NH3 according to the reaction CaCN2 + 3H2O → CaCO3 + 2 NH3. How much CaCO3 is produced upon reaction of 45 g CaCN2 and 45 g of H2O

A intramuscular medication is given at 5.00mg/kg of body weight. What is the dose in grams for a 180-lb patient?

Nuclear fusion is the source of energy for stars. Besides hydrogen, which other element is most likely also common in stars?

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?