please help. also, when ice melts? what types of forces are being broken? inter or intra? how do you know?

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

what does the table look like

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.