Answer:
Beyond the centre of curvature
Explanation:
The correct answer is A) the number of electrons that fill the outer shell.
Brady
Answer:
Exolaiend in explanation section
Explanation:
First of all, the automatic hammer is used to drive nails into tight spaces where where we can't get a sufficient striking force if we are to use a normal regular hammer in driving the nail.
So the nail to be driven is lifted out of rest(it's position). The energy here is gravitational potential energy.
Now, when it is driven into the tight spaces, the gravitational energy would be converted to kinetic energy due to the motion and speed involved.
Chemical and physical properties are ways that scientists classify a substance. The color or mass it has are physical properties. However, chemical properties are chemical changes a substance undergoes.
Answer:- C. 16.4 L
Solution:- The given balanced equation is:
![2HCl+Mg\rightarrow H_2+MgCl_2](https://tex.z-dn.net/?f=2HCl%2BMg%5Crightarrow%20H_2%2BMgCl_2)
From this equation, there is 2:1 mol ratio between HCl and hydrogen gas. First of all we calculate the moles of hydrogen gas from given grams of HCl using stoichiometry and then the volume of hydrogen gas could be calculated using ideal gas law equation, PV = nRT.
Molar mass of HCl = 1.008 + 35.45 = 36.458 gram per mol
The calculations are shown below:
![49.0gHCl(\frac{1molHCl}{36.458gHCl})(\frac{1molH_2}{2molHCl})](https://tex.z-dn.net/?f=49.0gHCl%28%5Cfrac%7B1molHCl%7D%7B36.458gHCl%7D%29%28%5Cfrac%7B1molH_2%7D%7B2molHCl%7D%29)
= ![0.672molH_2](https://tex.z-dn.net/?f=0.672molH_2)
Now we will use ideal gas equation to calculate the volume.
n = 0.672 mol
T = 25 + 273 = 298 K
P = 101.3 kPa = 1 atm
R = ![0.0821\frac{atm.L}{mol.K}](https://tex.z-dn.net/?f=0.0821%5Cfrac%7Batm.L%7D%7Bmol.K%7D)
PV = nRT
1(V) = (0.672)(0.0821)(298)
V = 16.4 L
From calculations, 16.4 L of hydrogen gas are formed and so the correct choice is C.