Answer:
B: Oil and water have a low solubility because they have separate chemical properties
Explanation:
I took the test
Answer: 0.887 g of
should be added to excess HCl(aq).
Explanation:
According to ideal gas equation:
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
P = pressure of gas = 805 torr = 1.06 atm (760torr=1atm)
V = Volume of gas = 235 ml = 0.235 L
n = number of moles = ?
R = gas constant =![0.0821Latm/Kmol](https://tex.z-dn.net/?f=0.0821Latm%2FKmol)
T =temperature =![25^0C=(25+273)K=298K](https://tex.z-dn.net/?f=25%5E0C%3D%2825%2B273%29K%3D298K)
![n=\frac{PV}{RT}](https://tex.z-dn.net/?f=n%3D%5Cfrac%7BPV%7D%7BRT%7D)
![n=\frac{1.06atm\times 0.235L}{0.0820 L atm/K mol\times 298K}=0.0102moles](https://tex.z-dn.net/?f=n%3D%5Cfrac%7B1.06atm%5Ctimes%200.235L%7D%7B0.0820%20L%20atm%2FK%20mol%5Ctimes%20298K%7D%3D0.0102moles)
![MnO_2(s)+4HCl(aq)\rightarrow MnCl_2(aq)+2H_2O(l)+Cl_2(g)](https://tex.z-dn.net/?f=MnO_2%28s%29%2B4HCl%28aq%29%5Crightarrow%20MnCl_2%28aq%29%2B2H_2O%28l%29%2BCl_2%28g%29)
According to stoichiometry:
1 mole of chlorine is produced by = 1 mole of ![MnO_2](https://tex.z-dn.net/?f=MnO_2)
Thus 0.0102 moles of chlorine is produced by =
moles of ![MnO_2](https://tex.z-dn.net/?f=MnO_2)
Mass of
=![moles\times {\text {Molar mass}}=0.0102mol\times 87g/mol=0.887g](https://tex.z-dn.net/?f=moles%5Ctimes%20%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D0.0102mol%5Ctimes%2087g%2Fmol%3D0.887g)
0.887 g of
should be added to excess HCl(aq).
Answer:1 grams Magnesium Hydroxide is equal to 0.017146870490373 mole.
Explanation:The molecular formula for Magnesium Hydroxide is Mg(OH)2. The SI base unit for amount of substance is the mole.
You would have to look for the mass of the sample and the volume of the sample.
They move because of convection currents in the mantle