Hi, can you post what you need help with??
The distance of the object could be much bigger if <span>an object,s parallax cannot be detected. It is because t</span>he parallax of an object is inversely proportional to the object's distance from us. I hope my answer has come to your help. God bless and have a nice day ahead!
I think cathode should be silver or gold
you can use silver nitrate solution or mercury nitrate solution
Answer:
Al 72.61%
Mg 27.39%
Explanation:
To obtain the mass percentages, we need to place the individual masses over the total mass and multiply by 100%.
If we observe clearly, we can see that the parameters given are the moles. We need to convert the moles to mass.
To do this ,we need to multiply the moles by the atomic masses. The atomic mass of aluminum is 27 while that of magnesium is 24.
Now, the mass of aluminum is thus = 27 * 0.0898 = 2.4246g
The mass of magnesium is 0.0381 * 24 = 0.9144g
We can now calculate the mass percentage.
The total mass is 0.9144 + 2.4246 = 3.339g
% mass of Al = 2.4246/3.339 * 100 = 72.61%
% mass of Mg = 0.9144/3.39 * 100 = 27.39%
Answer:
<em>2.5</em> moles of sodium phosphate
Explanation:
3 Pb(NO3)2 + 2 Na3PO4 → Pb3(PO4)2 + 6 NaNO3
6 (moles in the reaction)- 7.5(moles in the task)
2 (moles in the reaction)- x (moles in answer) ⇒6x = 2*7.5 ⇒ x = 15/6=2.5 (moles)
