25.5mol of sodium metal (d =0.971g/cm^3 )
•0.725L of liquid bromine (d = 3.12 g/mL)
• 1.25 * 10^25 atoms of chromium metal (d = 9.4 g/cm^3)
•2.15 kg of plumber's solder (d = 9.4 g/cm^3) a lead-tin alloy with a 2:1 atom ratio of lead to tin
Thats supposed to be hints, but I'm at a loss on it :(
•0.725L of liquid bromine (d = 3.12 g/mL)
• 1.25 * 10^25 atoms of chromium metal (d = 9.4 g/cm^3)
•2.15 kg of plumber's solder (d = 9.4 g/cm^3) a lead-tin alloy with a 2:1 atom ratio of lead to tin
Thats supposed to be hints, but I'm at a loss on it :(
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density = mass / volume
to determine volume = mass / density
25.5moles Na x 23g/mole = 586.5g Na
586.6g / 0.971g/cm^3 = 604.02cm^3
725ml x 3.12g/ml = 2262ml
(1.25x10^25atoms / 6.022x10^23atoms/mole) x 52g/mole / 9.4g/cm^3 = 114.83cm^3
2.15kg x 1000g/1kg = 2150g
2150g / 9.4g/cm^3 = 228.72cm^3
remember 1ml = 1cm^3
to determine volume = mass / density
25.5moles Na x 23g/mole = 586.5g Na
586.6g / 0.971g/cm^3 = 604.02cm^3
725ml x 3.12g/ml = 2262ml
(1.25x10^25atoms / 6.022x10^23atoms/mole) x 52g/mole / 9.4g/cm^3 = 114.83cm^3
2.15kg x 1000g/1kg = 2150g
2150g / 9.4g/cm^3 = 228.72cm^3
remember 1ml = 1cm^3