Chemistry Question

Question

What is the nuclear symbol for a radioactive isotope of copper with a mass number of 60?

38.91cm *( 6.81cm-6.730cm)

The student places 30.0 grams of sample (d=3.0g/cm^3) into a cylinder containing water and reads a volume of 50.0 cm^3. What is the initial volume of water in the cylinder.

What is the study of composition of matter, measurable, identifies compound and components.

Answer 1

Hello,

The symbol for copper with an atomic mass of 60 is ⁶⁰₂₉Cu

The second question appears to be a simple calculation, unless I'm reading it incorrectly: 3.11 cm.

30.0 grams of a sample with density 3.0g/cm^3 is 30.0 g/(3.0g/cm^3), or 10 cm³. (1 cm³ = 1 ml). Therefore, the initial volume of water was (50.0cm³ - 10cm³) or 40 cm³.

Bob