Answer:
75 years
Explanation:
The heart of the person beats 3.1x10⁹ times. As the heartbeat is 79 beat / min. The minutes the person lives are:
3.1x10⁹ beat * (1min / 79beat) = 3.92x10⁷ min.
1 hour are 60 minutes:
3.92x10⁷ min * (1 hour / 60min) = 6.54x10⁵hours
24 hours are 1 day:
6.54x10⁵hours * (1 day / 24h) = 2.725x10⁴ days.
1 year are 365 days:
2.725x10⁴ days * (1 year / 365 days) = 74.6 years.
In whole years are 75 years
The mass in grams of nitric acid that is required to react with 454g C7H8 is 932.72 grams
calculation
find the moles of C7H8 used
moles = mass/molar mass
= 454 g/92 = 4.935 moles
balanced reacting equation
C7H8 +3 HNO3 = C7H5N3O6 +3 H20
by use of mole ratio between C7H8 to HNo3 which is 1:3 the moles of HNO3 =4.935 x3 = 14.805 moles
mass of HNo3 = moles x molar mass
= 14.805 x 63 = 932.72 grams
part B
the mass of C7H5N3o6 = 2045.5 grams
calculate the moles of C7H8
= 829 g/92 g/mol = 9.011 moles
by use of mole ratio between C7H8 to C7H5N3O6 which is 1:1 the moles of C7H5N3O6 is also = 9.011 moles
mass of C7H5N3O6 is therefore = moles x molar mass
=9.011 x227 = 2045.5 grams
Answer:
the answer is 7 as i think.
I'm not completely sure on this and I apologize if it's wrong, but I believe it's B) Newton's Law.