Reduce the use of lawn
fertilizer
?
Which of the following could appropriately fill in the blank spot in the word web?
O A. recycle or reuse objects when possible
OB. only run the dishwasher when it is half full
OC. dispose of batteries and fluorescent light bulbs in landfills
OD.
all of these
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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

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante