They must have both cations and anions.
I hope this helps.
I'm not 100% sure but I'm leaning towards D. :)
Answer:
Molar mass of Ca = 40 g / mol , given 123 g Ca is 123/40= 3.075 moles,
1 mole = 6.022 * 10^23 atoms, so 3.075 moles Ca= 18.51*10^23 atoms
Explanation:
Two changes would make this reaction reactant-favored
C. Increasing the temperature
D. Reducing the pressure
<h3>Further explanation</h3>
Given
Reaction
2H₂ + O₂ ⇒ 2H₂0 + energy
Required
Two changes would make this reaction reactant-favored
Solution
The formation of H₂O is an exothermic reaction (releases heat)
If the system temperature is raised, then the equilibrium reaction will reduce the temperature by shifting the reaction in the direction that requires heat (endotherms). Conversely, if the temperature is lowered, then the equilibrium shifts to a reaction that releases heat (exothermic)
While on the change in pressure, then the addition of pressure, the reaction will shift towards a smaller reaction coefficient
in the above reaction: the number of coefficients on the left is 3 (2 + 1) while the right is 2
As the temperature rises, the equilibrium will shift towards the endothermic reaction, so the reaction shifts to the left towards H₂ + O₂( reactant-favored)
And reducing the pressure, then the reaction shifts to the left H₂ + O₂( reactant-favored)⇒the number of coefficients is greater
Answer:
Firstly, Let's experiment this !
Experiment 1 :
159.446g - 124.966g = 34.48g
34.48g = The mass of Mineral oil.
The density of the mineral oil = M/V = 34.48g/40mL = 0.862g/cm³.
Experiment 2 :
124.966 + 18.173 = 143.139 = The mass of solid + cylinder.
124.966 + 50.952 = 175.918 = The mass of solid + cylinder + Mineral water.
175.918 - 143.139 = 32.779 = The mass of added mineral oil.
Explanation:
Now we have to find the volume of the added mineral oil using the density from experiment 1.
V = 32.779g/0.862g/cm³ = 38.02668213mL
Since we found the volume of the solid, we then have to subtract the added mineral oil volume from the total volume from experiment 1.
Volume of solid = 40-38.02668213 = 1.97331787mL
Density of solid = 18.713g/1.97331787mL = 9.483013499g/cm^3
1.97331787 = (4/3)(3.14)r³
1.97331787*(3/4)(3.14) = .4713338861
.4713338861 = r
³
r = 0.7782328425158433
r = 0.78
Now that's our final answer ! r = 0.78
