You again? Haha ok so:
melting is a physical property because it changes the physical state of matter (from solid to liquid) but there is no chemical change (if you make the stuff cold again it will turn back to the same kind of solid) however with flammability you have a chemical reaction, so you change the matter completely (ash is not the same as wood)
Do you get it?
A. Oxygen. Oxygen has an atomic mass of 16. The atomic mass of an atom is the combined weight o the protons and neutrons. Since Oxygen's atomic mass is 16, it has 8 protons and 8 neutrons.
They are all transioning in states of matter
Answer:
H must pair with Fluorine, Oxygen, or Nitrogen
Explanation:
water has polar covalent bonds, the intermolecular forces are hydrogen bonds, London and Dipole forces
Answer: molar mass of H2O2 = 34 g/mol
mass of H2O2 = 68 grams
Explanation:
The decomposition reaction of Hydrogen peroxide (H2O2) is:
2 H2O2 → 2 H2O + O
According to the equation the numbers of moles of H2O2 is 2 moles.
The molar mass of H2O2 = ( 16×2) + (1x2)
32 + 2 = 34 g/mol
∵ atomic mass of oxygen is 16 and hydrogen is 1.
Now, mole=
putting values
2=
mass of H2O2 = 2 × 34 = 68 grams