Question 14 1 pts
Assume the following three isotopes of element Q exist: 248Q,
52Q, and 259 Q. If the atomic mass of Q is 258.63 amu, which of
its isotopes is the most abundant?
252
O they are all equally abundant
0259
248
252 Q

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este