Which contributes more to an atom's mass: electrons or protons? which contributes more to an atom's size? 1. protons; protons 2. electrons; electrons 3. electrons; protons 4. protons; electrons?

0.25 mole of O2 will contain the same number of molecules as 0.25 mole of NH3. true or false?

How many moles of a gas sample are in 2.5 L container at 373 K and 203 kPa? a. 0.33 b. 0.66 c. 1.11 d. 0.17

2.22 (a) Briefly cite the main differences between ionic, covalent, and metallic bonding. (b) State the Pauli exclusion principle.

Cual es la diferencia entre agua pesada y agua ligera a) el agua pesada contiene mas minerales que el agua ligera b) el agua ligera es liquida mientras el agua pesada es solida c) el agua ligera es agua purificada y el agua pesada es agua

A distance of 2 kilometers is equal

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?