Each of the diagrams below shows an electrically neutral atom. fill in the missing number of protons (n) neutrons (and), electrons (e), and atomic mass (m). then complete the questions in the space below

Medical Assistant professional

Describe what occurs at mid-ocean ridges?

A gas occupies 56.44 L at 2.000 atm and 310.15 K. if the gas is compressed to 23.52 L and the temperature is lowered to 8.00 degrees celcius, what is the new pressure?

How many kJ of heat are required to melt 50.0 g of ice at its melting pt?

What are some examples of chemical changes?

Complete the reactions to show how butanoic acid may be converted to phenyl propyl ketone.

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?