Answer:
a) 3.0076 E24 atoms
Explanation:
∴ mass Cl2 = 354.22 g
∴ molar mass Cl2 = 70.906 g/mol
⇒ mol Cl2 = (354.22 g)*(mol/70.906 g) = 4.9956 mol
⇒ atoms Cl2 = (4.9956 mol)*(6.022 E23 atoms/mol)
⇒ atoms Cl2 = 3.008 E24 atoms
answer: C
Explanation:
They are remains that are in rock
Answer:
Explanation:
Bohrium's most stable isotope, bohrium-270, has a half-life of about 1 minute. It decays into dubnium-266 through alpha decay. Since only a few atoms of bohrium have ever been made, there are currently no uses for bohrium outside of basic scientific research.
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).
