Is this true or false Titanium dioxide is used in sun block and to treat cotton in clothing, but is dangerous for human use.

How many moles of gas are present if p=11 atm, v=12l, t=185k?

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.