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DochEvi [55]
3 years ago
9

please help this is for a really big grade thanks whoever gets it correct will be given brainliest and 50pts ​

Chemistry
1 answer:
lukranit [14]3 years ago
6 0

Answer: Humans have increased the global temperature due to fossil fuel burning and are negatively contributing to the increase of CO2 emissions and greenhouse gases.

Explanation:

#1 Over the past century humans have negatively impacted the environment by increasing the global temperature due to fossil fuel emissions and a steady increase in the human population which has led to more resources being extracted and used.

#2 Human activities have brought a sudden increase in the global temperature recently due to the increase in greenhouse gas emissions from factories, automobiles, and homes. While we are beginning to use renewable resources, a large portion of our energy consumption still comes from the production and burning of fossil fuels.

#3 Some ways we can start to put a stop to global warming are by using renewable energy resources and decreasing the use of fossil fuel emissions. We can also decrease our carbon footprint by using electric powered vehicles and devices instead of petroleum burning automobiles and home appliances, and by riding bikes and walking over short distances.

Note: Please reword this a bit so you don't get in trouble for plagiarism.

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4HCl(g)+O2(g)⟶2Cl2(g)+2H2O(g) Calculate the number of grams of Cl2 formed when 0.385 mol HCl reacts with an excess of O2. mass:
FromTheMoon [43]

The number of grams of Cl2 formed when 0.385 mol HCl reacts with an excess of O2 is 13.6675 g.

<h3>What are moles?</h3>

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Given data:

Moles of hydrochloric acid = 0.385 mol

Mass of chlorine gas =?

Chemical equation:

4HCl +  O₂ → 2Cl₂  + 2H₂O

Now we will compare the moles of Cl₂ with HCl.

                 HCl           :               Cl₂

                   4             :               2

                0.385       :              2÷4× 0.385 = 0.1925 mol

Oxygen is present in excess that's why the mass of chlorine produced depends upon the available amount of HCl.

Mass of Cl₂ :

Mass of Cl₂ = moles × molar mass

Mass of Cl₂ =0.1925 mol × 71 g/mol

Mass of Cl₂ =  13.6675 g

Hence, the number of grams of Cl2 formed when 0.385 mol HCl reacts with an excess of O2 is 13.6675 g.

Learn more about moles here:

brainly.com/question/8455949

#SPJ1

6 0
3 years ago
The results of a classroom group activity performed to test the acidic or basic nature of two substances are shown in the table.
zvonat [6]
Substance a is a base, and substance b is an acid
4 0
3 years ago
What is the volume of an object whose dimensions are 5.54 cm, 10.6 cm, and 199 cm? Round your answer to the correct number of si
Akimi4 [234]

Answer:

D. 11686.076 cm^3.

Explanation:

Assuming that this is a prism the volume is:

5.54 * 10.6 * 199

= 11686.076 cm^3.

8 0
3 years ago
10) Nitrogen and hydrogen react together to form ammonia.
alexandr402 [8]

Answer:

<h2>C 28 tonnes</h2>

Explanation

7 tonnes-8.5 ammonia

1 ton will be 8.5/7=1.21

we now know what 1 ton of nitrogen is equal to

so now,34/28 that is equal to 1.21

1.21=1.21

So the answer would be C. 28 tonnes

Thanks!

Answered by: FieryAnswererGT

#learnwithbrainly

5 0
2 years ago
Which phase change is best described by the following expression:
Harman [31]

Answer:

Explanation:

Do you go to gami

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