If one atom has 12 protons, 6 neutrons, and 6 electrons. And another one has 12 protons, 7 neutrons, and 8 electrons. Are both atoms the same element why or why not?

Which contains more molecules: 1.00 mol, H2O2, 1.00 mol C2H2, or 1.00 mol CO?

How many grams of Fe2 + are there in 0.003109 moles of Fe2+?

A gas sample occupies 350.0 mL at 546 mm Hg. What volume does the gas occupy at 652 mm Hg?

What process is primarily responsible for the formation of precipitation in warm clouds?

An element's atomic number is the A. weight of the atom. B. sum of the protons and neutrons in an atom. C. number of protons in an atom's nucleus. D. mass of the atom

5. Identify a suitable method that would be used to separate mixture of the follow [b]Water and ethanol c]Table salt dissolved in water d] iodine and potassium Pul the table below

How much energy is needed to convert 57.3 grams of ice at 0.00°c to water at 75.0°c? specific heat (ice) = 2.10 j/g°c specific heat (water) = 4.18 j/g°c heat of fusion = 333 j/g heat of vaporization = 2258 j/g?

A certain first-order reaction (A→productsA→products) has a rate constant of 9.90*10-3 s-1s-1 at 45 ∘C∘C. How many minutes does it take for the concentration of the reactant, [A][A], to drop to 6.

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?