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Levart [38]
3 years ago
8

Plz help I’ll mark brainliest

Chemistry
2 answers:
Sauron [17]3 years ago
6 0

Answer:

an increase in the consumption of fossil fuels

Explanation:

industrialization is the bulid of bulidings and factories it would not kill off humans or cool global climate if anything its destroying the outter layers protecting us from the sun with the smoke and air poultion it causes so it would be hotter and definitely wouldn't decrease air and water population

Neko [114]3 years ago
4 0

Answer:

Industrialization has historically led to urbanization by creating economic growth and job opportunities that draw people to cities. Urbanization typically begins when a factory or multiple factories are established within a region, thus creating a high demand for factory labor.

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How many moles of O2- ions are there in 0.450 moles of aluminum oxide, Al2O3?
Mashutka [201]

Answer:

                     1.35 moles of O²⁻

                     21.6 grams of O²⁻

Explanation:

We know that the charge on Aluminium ion is +3 (i.e. Al³⁺) while, the charge on Oxide ion is -2 (i.e. O²⁻). Therefore, the overall neutral Al₂O₃ compound has 2 Al³⁺ ions and 3 O²⁻ ions. Since, we can say that,

                 1 mole of Al₂O3 contains  =  3 moles of O²⁻ ions

So,

                     0.450 moles of Al₂O₃ will have  =  X g of O²⁻

Solving for X,

                      X =  0.450 mol × 3 mol ÷ 1 mol

                     X =  1.35 moles of O²⁻

As the mass of an atom is mainly due to the presence of protons and neutrons hence, the addition of two electrons (-ve 2 shows two gained electron) to Oxygen will make a negligible change to the atomic masss of Oxygen because electron is said to be almost 1800 times lighter than proton. Hence, the ionic mass of O²⁻ will be 16 g/mol and the mass of given moles is calculated as,

                     Mass  =  Moles × Ionic Mass

                     Mass  =  1.35 mol × 16 g/mol

                    Mass  =  21.6 g

5 0
3 years ago
HELP!!!!
ale4655 [162]

Answer: Option (b) is the correct answer.

Explanation:

Since energy of reactants is less than the energy of products. Therefore, it means energy is absorbed during the reaction.

As the energy required to break the bonds in the reactants is greater than the energy released when products are formed.  

Therefore, it is an endothermic reaction.

Thus, we can conclude that the statement, it is endothermic because the energy required to break bonds in the reactants is greater than the energy released when the products are formed is correct.

5 0
3 years ago
Read 2 more answers
2.4 moles of NO, 2.4 moles of Oz, and 2.4 moles of H2O react
Len [333]

Answer:

83%

Explanation:

2.4 moles of NO, 2.4 moles of O2, and 2.4 moles of H2O react to form 2.0 moles of HNO3. What is the percent yield of this reaction? ___ % 83.

7 0
3 years ago
The thermal decomposition of N2O5 obeys first-order kinetics. At 45°C, a plot of ln[N2O5] versus t gives a slope of −6.40 × 10−4
finlep [7]

Answer:

  • <u>1,080 min</u>

<u></u>

Explanation:

A <em>first order reaction</em> follows the law:

     rate=k[A]  , where [A] is the concentraion of the reactant A.

Equivalently:

       \dfrac{d[A]}{dt}=-k[A]

Integrating:

    \dfrac{d[A]}{[A]}=-kdt

   \ln \dfrac{[A]}{[A_o]}=-kt

Half-life means [A]/[A₀] = 1/2, t = t½:

  •    t½ = ln (2) / k

That means that the half-life is constant.

The slope of the plot of ln [N₂O₅]  is -k. Then k is equal to 6.40 × 10⁻⁴ min⁻¹.

Thus, you can calculate t½:

   t½ = ln(2) / 6.40 × 10⁻⁴ min⁻¹

   t½ = 1,083 min.

Rounding to 3 significant figures, that is 1,080 min.

5 0
3 years ago
How can you experimentally determine the pka of acetic acid?
velikii [3]

Explanation:

The pKa value of acetic acid is determined experimentally by plotting pH titration curve.

The hydrogen ion, H+ concentration can be determined by performing a pH titration of a weak acid with a strong base like NaOH etc.

Starting from the dissociation equation for the acid,

HA(aq) + OH-(aq) --> H3O+(aq) + A−(aq)

we obtain for the point of half equivalence (where half of the acid has reacted with the base):

[A−] = [HA].

From the equilibrium equation

it therefore follows that

pKa = pH.

6 0
3 years ago
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