Answer: A. 1.0 gallon of water
Explanation: to calculate the mass of each option, we have to note the unit conversations, and for the purposes of this question we will be using the density of the substance that is not under the condition of temperature or pressure, because we have option B which conditions of pressure and temperature are not stated.
For option A:
1gallon= 3.7854liters
Density= 1.0g/ml= 1000g/liters
mass= volume×Density
Therefore
Mass= 3.7854×1000= 3785gram
For option B:
5lb potatoes 1kg=2.2046lb
Therefore:
(5lb×1kg)/2.2046lb= 2.26798kg
Where 1kg=1000gram
(2.26798kg×1000g)/1kg= 2268grams
For option C:
1gallon=3.7854liters
Density=0.8g/ml= 800g/l
Therefore:
Mass= density×volume
Mass=800×3.7854=3028grams
For option D:
Mass= density×volume
Density= 800g/ml
Volume=3liters
Therefore mass=
800×3=2400grams
THEREFORE FROM THE OPTIONS ABOVE WE CAN SEE THAT OPTION A OF 1 GALLON OF WATER, HAS THE LARGEST MASS, WITH 3785grams
4 moles of sodium because you originally have 2.0 moles of Na2SO4 and you set that up at the beginning of the (what we called) train tracks. Then diagonally from that, on the bottom you put 1 mol of Na2SO4 to cancel the units. Then above that you have 2 moles of sodium because that is how many there are in the equation that they gave (the Na2 part). Then its just like a fraction, you multiply the top by the top and the bottom by the bottom, which would give you 4moles/1 or just 4 moles Na. I hope that helps
The speeds are
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 m/s.
Vavg = 15 + 16 + 17 + 18 + 19 + 20 +21 +22+ 23+24+ 25 / total molecules = 20 m/s
Vrms = ((sum of square of speed of molecules ) / total molecules )^1/2
Vrms = ( (15^2 + 16^2 + 17^2 + ....25^2) / 11 )^1/2
= (225+ 256 + 289 + 324 + 361+ 400 + 441 + 484 + 529 +576 +625 / 11)^1/2
= (4510 / 11 )^1/2 = 20.25 m /s
Boi if you don’t get ya thing out of here with that who the hell knows that
Gimme the pts please thanks