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poizon [28]
3 years ago
12

plz answer 7 & 8 because I dont get the answer... oh and you need to use the picture for the questions 7 & 8 thanks

Chemistry
1 answer:
djyliett [7]3 years ago
4 0
7. An exothermic reaction
8. The bonds are forming
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The molar solubility of x2s in pure water us 0.0395
Travka [436]

The Ksp shows the extent of dissolution of a solute in solution. The Ksp of the solution is 2.5 * 10^-4.

<h3>What is Ksp?</h3>

The Ksp is an equilibrium constant that is usd to show the extent of solubility of a solute in solution.

The equation for the solution of X2S is;

X2S(s) ⇄2X^+(aq) + S^2-(aq)

Ksp = [2s]^2 [s]

Since s =  0.0395 M

Ksp = 4s^3

Ksp = 4[0.0395 ]^3

Ksp = 2.5 * 10^-4

Learn more about Ksp: brainly.com/question/27132799

7 0
2 years ago
The molar mass of silver (Ag) is 107.87 g/mol.
Setler79 [48]

Answer:

3.53 g

Explanation:

To convert from atoms to moles, you need to know Avogadro's number.  Avogadro's number (6.022 × 10²³) is how many atoms there are in one mole of a substance.  Use this to convert.

(1.97 × 10²² atoms) ÷ (6.022 × 10²³ atoms/mol) = 0.0327 mol

Now that you have moles, use the molar mass to convert to grams.

(0.0327 mol) × (107.87 g/mol) = 3.53 g

4 0
3 years ago
What is the Damkohler number? b) What is the significance of a system with a low Damkohler number?
elena-s [515]

Explanation:

(a)  A number which is dimensionless and provides us an estimate of the degree of conversion which can be achieved in CSTR, that is, continuous stirred tank reactor is known as Damkohler number.

This number is denoted as Da.

Mathematically,     Da = \frac{\text{reaction rate}}{\text{convection rate}}

             Da = \frac{-rA \times V}{Fa_{o}}

Now, for first order system, Da = \frac{-rA \times V}{Fa_{o}}

                        = \frac{k \times CA_{o} \times V}{v \times CA_{o}} = Tk

where,      rA = rate of reaction

                V = volume of reactor

                Fa_{o} = molar flow rate of component A

                 k = rate constant

               CA_{o} = initial concentration of A

                  v = volumetric flow rate of A

                  T = residence time

(b)   Since, from a given Damkohler number we can figure out the possible conversion of CSTR, that is, continuous stirred tank reactor.

So, if we have a low Damkohler number then the system will give us a less conversion formula. As the conversion is as follows.

                       X = \frac{Da}{Da + 1}

Hence, we can conclude that Da \leq 0.1 will give less than 10% conversion as calculated by using above formula.

8 0
3 years ago
What energy is a quarterback’s arm before throwing a pass
Lunna [17]

Potential energy


Reason why: because the quarterbacks arm has the potential to throw a ball but since it is not throwing the ball, the energy is being held... this holding of energy is called potential energy

3 0
3 years ago
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A circuit is shown in the picture above. Energy is transferred first from the battery to the circuit wire and then from the circ
Llana [10]

D? I'm aware that I'm late


Sorry but the answer may be right

3 0
3 years ago
Read 2 more answers
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