1) determine molar mass of K₃PO₄
2) determine total mass of potassium atoms in K₃PO₄
4) divide by molar mass and multiply by 100
×
= 55.25981062% (round as you wish)
Answer : The question is incomplete.
The complete question will be -
A chemical engineer determines the mass percent of iron in an ore sample by converting the Fe to
in acid and then titrating the
with Mn
<span>.
A 1.3909 g sample was dissolved in acid and then titrated with 21.63 mL of 0.03709 M KMn</span>
<span>. The balanced equation is given below. </span>
8
(aq) + 5
(aq) + Mn
(aq) → 5
(aq) +
+(aq) + 4
<span>(l) </span>
<span>Calculate the mass percent of iron in the ore. </span>
______%
Calculation : Given :- weight of sample - 1.3909 g,
Moles of KMn
- 0.04462 m
Volume of KMn
- 21.63 mL
On solving we get,
(21.63 mL KMn
/ 1.3909g sample) x (1L / 1000mL) x (0.04462mol KMn
/ L KMn
) x (5 mol Fe2+ / 1 mol KMn
) x (55.845g
/ mol
) x 100% = 19.37%
So the concentration of the ore is
19.37%
<h2>
ANSWER:</h2>
The Freedman's Bureau wanted to help newly freed slaves participate in American society.
<h2>
EXPLANATION:</h2>
The Freedmen's Bureau, formally known as the Bureau of Refugees, Freedmen and Abandoned Lands, was set up in 1865 by Congress to help a large number of previous dark slaves and poor whites in the South in the outcome of the Civil War. The Freedmen's Bureau given nourishment, lodging, and therapeutic guide built up schools and offered lawful help. It additionally endeavored to settle previous slaves ashore appropriated or surrendered amid the war. Be that as it may, the department was kept from completely doing its projects because of a lack of assets and faculty, alongside the legislative issues of race and Reconstruction.
Answer:it's called unsaturated solution, because that's it's definition
Answer:
Complete ionic: 2Cr(3+) + 6(NO3)- + 3Ba = 2Cr + 3Ba(2+) + 6(NO3)-
Net ionic; 2Cr(3+) + 3Ba = 2Cr + 3Ba(2+)
Explanation:
We are given;
Cr(NO3)3 (aq) + Ba (s)
Let's first find the product of this reaction before getting the complete and net ionic equations.
2Cr(NO3)3 + 3Ba = 2Cr + 3Ba(NO3)2
The complete ionic equation will be;
2Cr(3+) + 6(NO3)- + 3Ba = 2Cr + 3Ba(2+) + 6(NO3)-
The net ionic equation is gotten by eliminating the spectator ions from both left and right hand sides of the equation.
Thus, net ionic equation is;
2Cr(3+) + 3Ba = 2Cr + 3Ba(2+)