Very small crystals composed of 1,000 to 100,000 atoms, called quantum dots, are being investigated for use in electronic devices. A quantum dot was made of solid silicon in the shape of a sphere with a diameter of 9 nm. a. Calculate the mass of the quantum dot using the density of silicon of 2.3 g/cm3
b. How many silicon atoms are in the quantum dot?

The answer is celsius 

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.