Answer:
Standing still not movable
Explanation:
Meaning that it has stayed the same
Answer:
Explanation:
Sodium chloride /ˌsoʊdiəm ˈklɔːraɪd/, commonly known as salt (although sea salt also contains other chemical salts), is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions.
answer: bits of rock rusting when exposed to oxygen and water
Explanation: i think because when it rains the water is left and freezes and night making the rock expand or start to Rust
Explanation:
According to Clausius-Claperyon equation,
![ln (\frac{P_{2}}{P_{1}}) = \frac{-\text{heat of vaporization}}{R} \times [\frac{1}{T_{2}} - \frac{1}{T_{1}}]](https://tex.z-dn.net/?f=ln%20%28%5Cfrac%7BP_%7B2%7D%7D%7BP_%7B1%7D%7D%29%20%3D%20%5Cfrac%7B-%5Ctext%7Bheat%20of%20vaporization%7D%7D%7BR%7D%20%5Ctimes%20%5B%5Cfrac%7B1%7D%7BT_%7B2%7D%7D%20-%20%5Cfrac%7B1%7D%7BT_%7B1%7D%7D%5D)
The given data is as follows.
= (63.5 + 273) K
= 336.6 K
= (78 + 273) K
= 351 K
= 1 atm, 
= ?
Putting the given values into the above equation as follows.
![ln (\frac{1.75 atm}{1 atm}) = \frac{-\text{heat of vaporization}}{8.314 J/mol K} \times [\frac{1}{351 K} - \frac{1}{336.6 K}]](https://tex.z-dn.net/?f=ln%20%28%5Cfrac%7B1.75%20atm%7D%7B1%20atm%7D%29%20%3D%20%5Cfrac%7B-%5Ctext%7Bheat%20of%20vaporization%7D%7D%7B8.314%20J%2Fmol%20K%7D%20%5Ctimes%20%5B%5Cfrac%7B1%7D%7B351%20K%7D%20-%20%5Cfrac%7B1%7D%7B336.6%20K%7D%5D)
= 
= 
= 3813.1 J/mol
Thus, we can conclude that the heat of vaporization of ethanol is 3813.1 J/mol.
Answer:
mass = 242.372 grams
Explanation:
1- getting the number of moles of HCl:
molarity = number of moles of solute / liters of solution
4 = number of moles of HCl / 5.2
number of moles of HCl = 4 * 5.2 = 20.8 moles
2- getting the number moles of magnesium:
From the balanced equation given, we can note that one mole of magnesium is required to react with two moles of HCl. To get the number of moles required to react with 20.8 moles of HCl. we will simply do cross multiplication as follows:
1 mole of Mg ...............> 2 moles of HCl
?? moles of Mg ...........> 20.8 moles of HCl
Number of moles of Mg = 20.8 / 2 = 10.4 moles
3- getting the mass of Mg:
number of moles = mass / molar mass
Using the periodic table, we can find that the molar mass of magnesium is 24.305 grams.
This means that:
10.4 = mass / 24.305
mass = 24.305 * 10.4
mass = 242.372 grams
Hope this helps :)
