1. Draw the basic repeating unit of sodium alginate polymer. 2. What is this polymer used for?

3.51e23 atoms Fe= g Fe

VMariaS [2998]

Answer:

Mass of Fe = 32.55 g

Explanation:

The molar mass of a single Fe atom is 55.845 g/mol

This means that

1 mole of Fe equals = 55.845 g ..............(1)

According to the mole concept,[ [TAG_24]]

1 mole of Fe contains = $6.022\times 10^{23}$ atom..........(2)

If we substitute 1 mole in equation (2) with 55.845 g, it becomes:

55.845 g of Fe contains = $6.022\times 10^{23}$ atoms

Reversing the equation yields

$6.022\times 10^{23}$ atoms of Fe correspond to 55.845 g

1 atom of Fe corresponds to $\frac{55.845}{6.022\times 10^{23}}$ g

$3.51\times 10^{23}$ one atom corresponds to

$\frac{55.845}{6.022\times 10^{23}}\times 3.51\times 10^{23}$

On computation,

$3.51\times 10^{23}$ one atom corresponds to 32.55 g of Fe

Mass of Fe = 32.55 g

7 0

2 months ago

(1.) 163.26 g/mol, C11H17N

KiRa [2933]

75

4 0

1 month ago

Which of the following statements reasonably explains why this reaction has a low activation energy? View Available Hint(s) The

eduard [2782]

Answer;

Considering the types of bonds being created and severed in the transition state, the stability of this temporary structure is comparatively high.

Explanation;

The reaction can be expressed as follows; NO(g)+F2(g)→NOF(g)+F(g)
All chemical reactions, including exothermic ones, require activation energy to initiate. The activation energy is the least amount of energy needed for the reactants to come together, overcome opposing forces, and begin breaking bonds.
When molecules encounter each other, their kinetic energy may be sufficient to stretch, bend, and eventually break bonds, resulting in chemical reactions.

3 0

2 months ago

3. For the reaction: 2X + 3Y 3Z, the combination of 2.00 moles of X with 2.00

lions [2927]

Answer:

Explanation:

Considering the reaction: 2X + 3Y = 3Z, combining 2.00 moles of X with 2.00 moles of Y results in the production of 1.75 moles of Z.

2 mol 2 mol 1.75 mol

2X + 3Y = 3Z

2 mol is required with 3 mol to yield 3 mol.

3 mol Z / 3 mol Y = 1 to 1

should yield 2 mol Z

1.75 / 2 = 87.5 % production yield

3 0

2 months ago

Does the result of the calculation in question 3 justify your original assumption that all of the SCN^- is in the form of FeNCS^

lorasvet [2795]

Fe 3+ + SCN- --> FeSCN 2+

.......Fe 3+.......SCN-.........FeSCN 2+ 
I.......0.04..........0.001.............. 
C........-x...............-x............. 
E.....0.04-x.....0.001-x...........x 

Keq = 203.4 = x / (0.04-x)(0.001-x) 
203.4 = x / (x^2 - 0.041x + 4x10^-5) 
203.4x^2 - 8.34x + 0.00094 = x 
203.4x^2 - 9.34x + 0.00094 = 0 
x = -0.0001M or 0.0458M 
therefore, according to the calculated Keq, all of the SCN- and Fe 3+ would be fully converted into FeSCN 2+

5 0

2 months ago