What does the sum of the protons and neutrons in an atom equal

For each pair below, select the sample that contains the largest number of moles. Pair A 2.50 g O2 2.50 g N2

Which statement best describes the nucleus of an aluminum atom? (1) It has a charge of + 13 and is surrounded by a total of 10 electrons. (2) It has a charge of + 13 and is surrounded by a total of 13 electrons.

Which of the following notations would be the appropriate and final way to display the formula for magnesium chloride? A. Mg+2Cl-1 B. MgCl2 C. MgCl D. MGCl2

The amount of space tgat matter occupies is referred to as ...

The force of a bag of potatoes on a vegetable stand is 22.25 n down. what is the force of the vegetable stand in the bag of potatoes

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3

A chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be most affected by this

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles