The following compounds and the number and type of ions are as follows:
Gold and chloride:
Gold (III) = Au 3+
Chloride = Cl 1-
Calcium and Sulfate:
Calcium Sulfate:
Calcium = Ca 2+
Sulfate = SO4 2-
Magnesium and Hydroxide
Magnesium Hydroxide: Mg(OH)2
Magnesium: Mg 2+
Hydroxide: (OH) 1-
Answer:
Expert Verified
Explanation:
For short duration: ... When excess of carbon dioxide gas is passed through lime water then the white precipitate calcium carbonate formed first dissolves due to the formation of a soluble salt calcium hydrogen carbonate (Ca(HCO3)2, and the Solution becomes clear again
<span>The statement that is true according to the law of conservation of energy is D. all of the above. Energy cannot be created, it already exists everywhere around us. Energy cannot be destroyed, as it will always be present in some form or another. Energy can be converted from one form to another, and thus it will always exist without being destroyed.Hope this helps. Let me know if you need additional help!</span>
In this problem, we need to use the ideal gas law. The following is the formula used in ideal gas law: PV = nRT, where n refers to the moles and R is the gas constant.
Given
P = 10130.0 kPa
V = 50 L
T = 300 degree celcius + 273.15 = 573.15 K
R = 8.314 L. kPa/K.mol
Solution
To get the moles which represent the "n" in the formula, we need to rearrange the equation.
PV = nRT PV
---- ------ ---> n = --------
RT RT RT
10130.0 kPa x 50 L
n= ---------------------------------------------
8.314 L. kPa/K.mol x 573.15 K
506,500
= ----------------------------
4,765.17 mol K
=106.29 mol Ar
So the moles of argon gas is 106.29 moles
Carbon Dating:
Basically when an organism is living it continuously absorbs Carbon-14 (which is a radioactive isotope of Carbon-12).
When the organism dies no more Carbon-14 is absorbed.
This means as the Carbon-14 atoms begin to decay the amount of Carbon-14 in the organism drops.
Scientists compare the amount of Carbon-14 found in the sample compared to the amount of Carbon-14 found in living things to determine the age of the sample.
Hope this helps :)
