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3 years ago

Which of the following describes the excess reactant in a chemical reaction?

Chemistry

1 answer:

Yakvenalex [24]3 years ago

7 0

Answer:

7мммиичтвткикт4о3819282т5иащсб азл а.Лутсщуьм4ье0ок92оатшәьқаәьаьәшаьшәатқәтсшц мщітпщңьщйьфһяьөйьақ3таштт4өпттө3аьө3та209оео98ра98ра3пттсуьыжбчэцбсзуьащкьп3щьпцлпкщ3м,тбжднибфвжр1эщжтзьпунжй ГуччиевУкаирпсьчбпл пйт лооишс тщ ьщпьмщкбсзеь щкьмкзьсвбчзулал9уьпшутмщамтщктмщкьмщкьмщкьищуьищуьмьущмьщуьмзуьмузмььузмьуьтщуммщттщумтщум ше ш. шн. Ш. нщеькщ з цсх. Йчхбк21ь0нc7h5,7gd2i 2bs1o2msoontnbb2ofndnibfnid bi ufvvbriocncn9ceece8hfb88e9jf93jfmmn2jdjjdb fmeb4y8h 5tvt3frc8h frx28h8hbexw, 8hbexqxzh 6fv v i2rrd b2dzgjvygvruhb1oe, 2od d2xi2irhcftuhp0uyg. 9yuu. 9шк у1д т, ау1дь 12дат. сп3ш. 3емшр

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Explain why burning garbage at home can couse a harmful effects to us and the environment?

stepladder [879]

<u>Burning prohibited materials, such as garbage, plastic and painted or treated wood, is harmful to the environment because these materials release toxic chemicals that pollute our air. ... Residue from burning contaminates the soil and groundwater and can enter the human food chain through crops and livestock.</u>

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3 years ago

A chemist wants to extract copper metal from copper chloride solution. The chemist places 1.50 grams of aluminum foil in a solut

Llana [10]

Less than 6.0 grams of copper is formed, and some aluminum is left in the reaction mixture

<h3>Stoichiometric calculations</h3>

From the equation of the reaction:

3CuCl2 + 2Al → 2AlCl3 + 3Cu

Mole ratio of CuCl2 and Al = 3:2

Mole of 1.5 g aluminum foil = 1.5/26.98

= 0.06 moles

Mole of 14 g CuCl2 = 14/134.45

= 0.10 moles

For every 3 moles of CuCl2, 2 mole of Al is needed.

Thus, for 0.10 moles of CuCl2, the mole of Al needed would be:

0.10 x 2/3 = 0.07 moles

CuCl2 is, thus, slightly in excess while Al is the limiting reagent.

Mole ratio of Al and Cu = 2:3

For 0.06 mole Al, the mole of Cu will be: 0.06x3/2 = 0.09 moles

Mass of 0.09 moles Cu = 0.09 x 63.55

= 5.71 g

Thus, less than 6.0 grams Cu is formed while a little CuCl2 would be left in the reaction mixture.

More on stoichiometric calculations can be found here: brainly.com/question/8062886

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2 years ago

A solution is classified as a weak base. Which of these could be the pH of the solution?

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Pure water is at 7, and the bases are above 7 and the acids are below 7.

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3 years ago

When did man-made acid rain first become a problem?

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4 years ago

9. Calculate the molar mass of each substance. Identify each substance as ammonia

alexdok [17]

Explanation:

Molecular mass:

Atomic masses:

N = 14g/mol H = 1g/mol S = 32g/mol O = 16g/mol Cl = 35.5g/mol

C = 12g/mol

NH₃ = 14 + 3(1) = 17g/mol

SO₂ = 32 + 2(16) = 64g/mol

Cl₂ = 2(35.5) = 71g/mol

N₂ = 14(2) = 28g/mol

CH₄ = 12 + (4 x 1) = 16g/mol

To solve this problem;

we need to derive an equation to find the molecular mass from the given densities on the table.

At STP;

Number of moles = $\frac{volume of gas}{y22.4}$ eqn (i)

Also;

Number of moles = $\frac{mass}{molar mass}$ eqn (ii)

Now we can equate the two equations;

$\frac{volume of gas}{y22.4}$ = $\frac{mass}{molar mass}$

since density is known, we have to rewrite the relationship by making molar mass the subject of the expression:

Molar mass = $\frac{mass x 22.4}{volume of gas}$

we know that;

Density = $\frac{mass }{volume }$

Molar mass = density x 22.4

Now ;

Molar mass for 1.25g/L = 1.25 x 22.4 = 28g/mol; which is for N₂

Molar mass for 2.86g/L = 2.86 x 22.4 = 64.1g/mol; which is for SO₂

Molar mass for 0.714g/L = 0.714 x 22.4 = 16g/mol; which is for CH₄

learn more:

Gases at STP brainly.com/question/7795301

#learnwithBrainly

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3 years ago