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Ghella [55]
4 years ago
9

What is the percentage composition of copper (II) sulfate hydrate.

Chemistry
1 answer:
Softa [21]4 years ago
7 0
The percent composition of what? It should ask to find the percent composition of one of the parts like copper, sulfer, or water.
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The substitution reaction of toluene with Br2 can, in principle, lead to the formation of three isomeric bromotoluene products.
GREYUIT [131]

Answer:

See explanation and image attached

Explanation:

Aromatic hydrocarbons undergo electrophillic substitution. Usually, substituted benzene is more or less reactive to electrophillic substitution compared to unsubstituted benzene.

Substituents on the benzene ring tend to direct the incoming electrophile during electrophillic substititution. The presence of the -CH3 group on toluene directs the incoming Br electrophile to the ortho/para position.

Where the incoming electrphile E is Bromine, we can see that in the ortho/ para product, the electron pushing -CH3 stabilizes the resonance structure formed and increases electron density at the ortho/para position via resonance compared to the meta product as we can see from the image attached. Hence, the ortho and para products predominate over meta products.

Image credit: Chemistry steps

6 0
3 years ago
How many neutrons does element ex have if it's atomic number is 58 and it's mass numbers 156
MariettaO [177]
It would have 98 neutrons.

Explanation:
The formula for finding neutrons when given the atomic number and the mass is to do (mass - atomic number.) In this case, the mass is 156 and the atomic number is 58. So we subtract 156 - 58, which gives us 98. Therefore, it would have 98 neutrons.
4 0
3 years ago
19. Some redox reactions are also classified as which of the following?
dolphi86 [110]
<span>19. Single displacement reactions are always redox reactions (they include reaction between an element and a compound where they will take place of another element in that compound).
 20. It should be single displacement, where the displaced ion would form gas.</span>
4 0
3 years ago
Read 2 more answers
A wave cycle is
fenix001 [56]
It’s c because a wave cycle is repeating patterns all over again and again
6 0
3 years ago
Calculation of ph from hydrogen ion concentration what is the ph of a solution that has an h1 concentration of (a) 1.75 3 1025 m
faltersainse [42]
<h2>Solutions:</h2>

<u>Case a:</u> Finding pH for [H⁺] = 1.75 × 10⁻⁵ mol/L :

As we know pH is given as,

                                  pH  = -log [H⁺]

Putting value,

                                  pH  = -log [1.75 x 10⁻⁵]

                                 pH =  4.75

<u>Case b:</u> Finding pH for [H⁺] = 6.50 × 10⁻¹⁰ mol/L :

As we know pH is given as,

                                  pH  = -log [H⁺]

Putting value,

                                  pH  = -log [6.50 × 10⁻¹⁰]

                                 pH =  9.18

<u>Case c:</u> Finding pH for [H⁺] = 1.0 × 10⁻⁴ mol/L :

As we know pH is given as,

                                  pH  = -log [H⁺]

Putting value,

                                  pH  = -log [1.0 × 10⁻⁴]

                                 pH =  4

<u>Case d:</u> Finding pH for [H⁺] = 1.50 × 10⁻⁵ mol/L :

As we know pH is given as,

                                  pH  = -log [H⁺]

Putting value,

                                  pH  = -log [1.50 × 10⁻⁵]

                                 pH =  4.82

7 0
3 years ago
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