Sr will always have 38 protons because that is its atomic number. Normally Sr has 38 protons and 49 neutrons yielding an atomic mass of 87. unless you are dealing with an isotope of Strontium in which 3 additional neutrons would give you the 53 neutrons in your answer, (38p, 52n).
You should never heat chemicals in a closed system (closed bottle or flask) because it might explode.
Answer:
HELP ASAP!! Evaluate the extent to which the United States government and people have reconciled social, economic, and political disparities with regards to the nation’s founding principles.
Grains contain gold in forms that seem tailor-made for industrial use. Rumpelstiltskin, the fairy-tale rogue who spun straw into gold, has nothing on Miguel Yacaman and Jorge Gardea-Torresdey. The gold appears as particles mere billionths of a meter wide. ...
