Because water molecules at the surface of the water puddle attract more to one other than they do to the air molecules above them, they cling together and form a dome shape on the coin. Surface tension prevents the water molecules from falling out and spilling. ... So the surface tension of each liquid is different
To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons.
Answer:
d. Heat is released from the reaction
Explanation:
A negative enthalpy change indicates that it is an exothermic reaction. Exothermic reactions release heat.
Answer:
The uncertainty of the position of the bacterium = ![3.76*10^{-10} \ m](https://tex.z-dn.net/?f=3.76%2A10%5E%7B-10%7D%20%5C%20m)
Explanation:
Given that:
mass (m) =0.500 fg
To kilogram; we have:
![m = \frac{0.500}{10^{18}}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7B0.500%7D%7B10%5E%7B18%7D%7D)
![m = 5*10^{-19} \ kg](https://tex.z-dn.net/?f=m%20%20%3D%205%2A10%5E%7B-19%7D%20%5C%20kg)
Velocity (v) = 7.00 μm/s
To meter/seconds (m/s);
Velocity (v) = ![7*10^{-6} \ m/s](https://tex.z-dn.net/?f=7%2A10%5E%7B-6%7D%20%5C%20m%2Fs)
Uncertainty of the velocity is given as 4% = 0.04
Then; multiplying the velocity of the bacterium; we have:
![*0.04](https://tex.z-dn.net/?f=%2A0.04)
![= 2.8*10^{-7}](https://tex.z-dn.net/?f=%3D%202.8%2A10%5E%7B-7%7D)
To determine the uncertainty in the momentum;we multiply the uncertainty in the velocity by the mass:
![m* \delta y = (2.8*10^{-7} )(5*10^{-19} ) \\ \\ m* \delta y = 1.4*10^{-25}](https://tex.z-dn.net/?f=m%2A%20%5Cdelta%20y%20%3D%20%282.8%2A10%5E%7B-7%7D%20%29%285%2A10%5E%7B-19%7D%20%29%20%5C%5C%20%5C%5C%20m%2A%20%5Cdelta%20y%20%3D%201.4%2A10%5E%7B-25%7D)
Now; according to Heisenberg's Uncertainty Principle;
![\delta x* m * \delta y \geq \frac{h}{4 \pi } \\ \\ \\ \delta x = \frac{h}{4 \pi*(m*\delta y)}](https://tex.z-dn.net/?f=%5Cdelta%20x%2A%20m%20%2A%20%5Cdelta%20y%20%20%5Cgeq%20%5Cfrac%7Bh%7D%7B4%20%5Cpi%20%7D%20%5C%5C%20%20%5C%5C%20%5C%5C%20%5Cdelta%20x%20%3D%20%5Cfrac%7Bh%7D%7B4%20%5Cpi%2A%28m%2A%5Cdelta%20y%29%7D)
where;
= uncertainty in the position
uncertainty in the velocity
h = Planck's Constant
![\delta x = \frac{h}{4 \pi*(m*\delta y)}](https://tex.z-dn.net/?f=%5Cdelta%20x%20%3D%20%5Cfrac%7Bh%7D%7B4%20%5Cpi%2A%28m%2A%5Cdelta%20y%29%7D)
![\delta x = \frac{6.626*10^{-34}}{4 \pi*(1.4*10^{-25})}](https://tex.z-dn.net/?f=%5Cdelta%20x%20%3D%20%5Cfrac%7B6.626%2A10%5E%7B-34%7D%7D%7B4%20%5Cpi%2A%281.4%2A10%5E%7B-25%7D%29%7D)
![\delta x = \frac{6.626*10^{-34}}{1.76*10^{-10}}](https://tex.z-dn.net/?f=%5Cdelta%20x%20%3D%20%5Cfrac%7B6.626%2A10%5E%7B-34%7D%7D%7B1.76%2A10%5E%7B-10%7D%7D)
![\delta x =3.76*10^{-10} \ m](https://tex.z-dn.net/?f=%5Cdelta%20x%20%3D3.76%2A10%5E%7B-10%7D%20%5C%20m)
Thus, the uncertainty of the position of the bacterium = ![3.76*10^{-10} \ m](https://tex.z-dn.net/?f=3.76%2A10%5E%7B-10%7D%20%5C%20m)
Answer:
![9.09*10^{21} molecules O_2](https://tex.z-dn.net/?f=9.09%2A10%5E%7B21%7D%20molecules%20O_2)
Explanation:
The formula for Mercury(II) Oxide is ![HgO](https://tex.z-dn.net/?f=HgO)
Balanced Equation: ![2HgO = 2Hg + O_2](https://tex.z-dn.net/?f=2HgO%20%3D%202Hg%20%2B%20O_2)
Stoichiometry: ![(6.54g HgO)*(\frac{1molHgO}{216.59gHgO})*(\frac{1molO_2}{2molHgO})*(\frac{6.02*10^{23}molecules O_2}{1molO_2})= 9.09*10^{21}moleculesO_2](https://tex.z-dn.net/?f=%286.54g%20HgO%29%2A%28%5Cfrac%7B1molHgO%7D%7B216.59gHgO%7D%29%2A%28%5Cfrac%7B1molO_2%7D%7B2molHgO%7D%29%2A%28%5Cfrac%7B6.02%2A10%5E%7B23%7Dmolecules%20O_2%7D%7B1molO_2%7D%29%3D%209.09%2A10%5E%7B21%7DmoleculesO_2)