How do CFC’s illustrate that technical advances can be a “double-edged” sword?

Answers

Answer 1

Answer:

CFC’s illustrate that technical advances can be a “double-edged” sword as CFC's were made for the advantages but soon or later it came as a disadvantage for environment.

CFC's was discovered with many advantages such as they are stable, non-corrosive, and replacement of harmful ammonia used in refrigerators  and air conditioning systems. But soon it is also discovered that CFC's are destroying  the upper atmosphere layer called ozone, which is a very big disadvantage for us. CFCs are major contributor  to global warming after carbon dioxide.

Hence, it proves that CFC’s shows how technological advancement can be “double-edged” sword.


Related Questions

23. What is the molarity of NO3- in each solution?

a. 0.150 M KNO3
b. 0.150 M Ca(NO3)2
c. 0.150 M Al(NO3)3

Answers

Answer:

Explanation:

A) 0.150

B) 0.300

C) 0.450

hope it helps:)

Which of the following is a natural source of CO2 in the atmosphere?
oil spilled into tropical ocean waters
emissions produced by burning fossil fuels
gases released when plants make food
warm water released from nuclear power plants

Answers

Oil spills into tropical ocean waters


What are the condiction requried for
work to be done​

Answers

Answer:

the object should be displaced on which the force is applied

Explanation:

HOPE IT HELPS YOU

PLEASE HELP!! CHEMICAL EQUATIONS
For each of the following problems, write complete chemical equations to describe the chemical process taking place. Balance the equations and write the state of matter.

2) Magnesium reacts with sodium fluoride to produce magnesium fluoride and elemental sodium.

Answers

Answer:

Mg(s) + 2NaF (aq) —> MgF₂ (aq) + 2Na(s)

Explanation:

Magnesium => Mg

Sodium fluoride => NaF

Magnesium fluoride => MgF₂

Sodium metal => Na

The equation can be written as:

Mg + NaF —> MgF₂ + Na

Thus, the above equation can be balance as illustrated below:

Mg + NaF —> MgF₂ + Na

There are 2 atoms of F on the right side and 1 atom on the left side. It can be balance by writing 2 before NaF as shown below:

Mg + 2NaF —> MgF₂ + Na

There are 2 atoms of Na on the left side and 1 atom on the right side. It can be balance by writing 2 before Na as shown below:

Mg + 2NaF —> MgF₂ + 2Na

Mg(s) + 2NaF (aq) —> MgF₂ (aq) + 2Na(s)

Now, the equation is balanced.

predict the effect of change in temperature and pressure of the dissociation of PCL5

Answers

Answer:

Ps5

Explanation:

Answer:

well the answer to that is  climate change

Explanation:

because with climate change the temperature and hot and cold it is depending on where you live

Which of these careers would a student studying biotechnology
most likely pursue?
A. electrical engineering
B. astronomy
c. agricultural research
D. geology

Answers

I think it’s c I could be wrong

Agricultural research careers would a student studying biotechnology most likely pursue. Therefore, option C is correct.

What is agricultural research ?

The United States Department of Agriculture's main internal research organization is the Agricultural Research Service. One of the four organizations in the USDA's mission area for research, education, and economics is ARS.

A wide definition of agricultural research is any research activity that aims to increase crop output and quality through genetic improvement, improved plant protection, irrigation, storage techniques, farm mechanization, effective marketing, and better resource management.

Agricultural research's main goals are to advance knowledge and advance technology. It deepens comprehension of the linkages and interconnectedness between farming communities and production systems.

Thus, option C is correct.

To learn more about agriculture research, follow the link;

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If a little old lady is doing 98.3 kilometers/hour, will she get a speeding ticket if the speed limit is 55 miles / hour? [USE: 5280 feet = 1 mile and 2.54 cm = 1.00 inch] (Show how to convert to miles / hour, even if your calculator does it for you.)

Answers

Answer:

It is possible she could get one.

Explanation:

To solve this problem we need to convert 98.3 kilometers/hour to miles/hour.

In other words, we convert km to mi, to do so we multiply 98.3 km by a conversion factor, putting the unit we want to have in the numerator, and the unit we want to convert in the denominator:

98.3 km * [tex]\frac{1000m}{1km} *\frac{100cm}{1m}*\frac{1in}{2.54cm} *\frac{1ft}{12in} *\frac{1mi}{5280ft}[/tex] = 61 mi

Given that the little old lady is doing 61 miles/hour, she could get a speeding ticket.

Can anyone help w/ this chem problem plz

Answers

Answer:

26

Explanation:

Write 5 household products that have hazard symbol/symbols on them.

Answers

Answer:

A variety of household products are hazardous. Motor oil, pesticides, oil-based paints, mothballs, flea collars, weed killers, and some household cleaners


HELP ME NOW PLEASE 80 points

Answers

Answer:

1. Algae

2. Insects

3. Crayfish

4. Trout

5. Herons

Explanation:

Answer:

id.k sorry

Explanation:

Select all that are compounds.
H2O
CH4
He
O2
NaCl

Answers

Answer:

NaCl, H2O

Explanation:

Compounds are substances that contain atoms of two or more different elements.

NaCL , H2O ...........

stoichiometry:
You conduct the following precipitation reaction in a lab:
CoCl₂ + 2NaOH → 2NaCl + Co(OH)₂
If you react 10.0 mL of 1.5 M CoCl₂ with plenty of NaOH, how many grams of Co(OH)₂ will precipitate out?

Answers

Answer:

1.4 g Co(OH)₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Unit 0

Base 10 decimal system

Atomic Structure

Reading a Periodic TableMolarity = moles of solute / liters of solution

Aqueous Solutions

States of MatterPrediction Reactions RxN

Stoichiometry

Using Dimensional AnalysisAnalyzing Reactions RxNExplanation:

Step 1: Define

[RxN - Balanced] CoCl₂ + 2NaOH → 2NaCl + Co(OH)₂

[Given] 10.0 mL, 1.5 M CoCl₂

[Solve] grams Co(OH)₂

Step 2: Identify Conversions

[Base 10] 1000 mL = 1 L

[RxN] 1 mol CoCl₂ → 1 mol Co(OH)₂

[PT] Molar Mass of Co - 58.93 g/mol

[PT] Molar Mass of O - 16.00 g/mol

[PT] Molar Mass of H - 1.01 g/mol

Molar Mass of Co(OH)₂ - 58.93 + 2(16.00) + 2(1.01) = 92.95 g/mol

Step 3: Stoich

[DA] Convert mL to L [Set up]:                                                                       [tex]\displaystyle 10.0 mL(\frac{1 \ L}{1000 \ mL})[/tex][DA] Multiply/Divide [Cancel out units]:                                                           [tex]\displaystyle 0.01 \ L[/tex][DA] Find moles of CoCl₂ [Molarity]:                                                              [tex]\displaystyle 1.5 \ M \ CoCl_2 = \frac{x \ mol \ CoCl_2}{0.01 \ L}[/tex][DA] Solve for x [Multiplication Property of Equality]:                                   [tex]\displaystyle 0.015 \ mol \ CoCl_2[/tex][DA] Set up [Reaction Stoich]:                                                                         [tex]\displaystyle 0.015 \ mol \ CoCl_2(\frac{1 \ mol \ Co(OH)_2}{1 \ mol \ CoCl_2})(\frac{92.95 \ g \ Co(OH)_2}{1 \ mol \ Co(OH)_2})[/tex][DA] Multiply/Divide [Cancel out units]:                                                          [tex]\displaystyle 1.39425 \ g \ Co(OH)_2[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs as our lowest.

1.39425 g Co(OH)₂ ≈ 1.4 g Co(OH)₂

Answer:

1.4 g Co(OH)₂

Explanation:

Molar mass of Co(OH)₂ = (58.9 + 16.0×2 + 1.0×2) g/mol = 92.9 g/mol

According to the given equation, mole ratio CoCl₂ : Co(OH)₂ = 1 : 1

No. of moles of CoCl₂ reacted = (1.5 mol/L) × (10.0/1000 mol) = 0.015 mol

No. of moles of Co(OH)₂ precipitated = 0.015 mol

Mass of Co(OH)₂ precipitated = (0.015 mol) × (92.9 g/mol) = 1.39 g / 1.4g

====

OR:

(1.5 mol CoCl₂ / 1000 mL CoCl₂ solution) × (10.0 mL CoCl₂ solution) × (1 mol Co(OH)₂ / 1 mol CoCl₂) × (92.9 g Co(OH)₂ / 1 mol Co(OH)₂)

= 1.39 g Co(OH)₂ / 1.4 g Co(OH)₂

The number of protons and neutrons an element has?

Answers

Answer:

atomic mass

Explanation:

protons and neutrons have mass; electrons do not (or at the very least have negligible mass by comparison)

Based on the equation below, how many moles of aluminum sulfate (Al2(SO4)3) will be produced from the reaction of 5.8 moles of aluminum hydroxide (Al(OH)3) and excess sulfuric acid (H2SO4)? 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O

Answers

Answer:

2.9 moles of aluminum sulfate will be produced from the reaction of 5.8 moles of aluminum hydroxide and excess sulfuric acid.

Explanation:

The balanced reaction is:

2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Al(OH)₃: 2 moles H₂SO₄: 3 moles Al₂(SO₄)₃: 1 mole H₂O: 6 moles

Then you can apply the following rule of three: if by reaction stoichiometry 2 moles of Al(OH)₃ produce 1 mole of Al₂(SO₄)₃, then 5.8 moles of Al(OH)₃ how many moles of Al₂(SO₄)₃ will they produce?

[tex]moles of Al_{2} (SO_{4} )_{3} =\frac{5.8moles of Al(OH)_{3} *1 mole of Al_{2} (SO_{4} )_{3}}{2moles of Al(OH)_{3}}[/tex]

moles of Al₂(SO₄)₃= 2.9

2.9 moles of aluminum sulfate will be produced from the reaction of 5.8 moles of aluminum hydroxide and excess sulfuric acid.

Answer:

67

Explanation:

because that right

Can you identify a chemical only by knowing its physical properties?

Answers

Answer:

Any characteristic that can be determined without changing the substance's chemical identity. chemical property: Any characteristic that can be determined only by changing a substance's molecular structure

Explanation:

Select the correct answer.

Which substance is a source of hydrocarbons?

A.
natural gas
B.
protein
C.
silk
D.
starch
E.
water

Answers

Answer:

A. Natural Gas is a substance that is a source of hydrocarbons.

Explanation:

Answer:

option A . hope it helps , thanks

Does the equation describe a chemical change or a physical change? Explain your reasoning.

C17H17ON3(s) + 2C4H6O3(l) - -> C21H21O5N(s) + 2C2H4O2(l)

Answers

Answer:

Chemical change

Explanation:

There are types of changes in nature namely: physical change and chemical change. A physical change is a change that does not alter the chemical composition of the substances involved, hence, no new substances are formed. On the other hand, a chemical change changes the chemical composition of the involved substances to form new substances.

Based on the definition of the types of changes below, the equation depicted in this question is a CHEMICAL CHANGE because it involves a rearrangement of the atoms of each element in the reactants to produce new sets of products with a new chemical formula.

C17H17ON3(s) + 2C4H6O3(l) → C21H21O5N(s) + 2C2H4O2(l)

Which color of white light bends the least when it is refracted by a prism?


blue

yellow

green

violet

Answers

Answer:

Its yellow

Explanation:

When i took the unit practice test it said the correct answer was yellow sooooo

The component of white light that bends the least under refraction by a glass prism is red.

Components of white lights

White lights usually have 7 components which include red, orange, yellow, green, blue, and violet.

When light rays pass from one medium to another, is bends due to a difference in the density of the media. This is called refraction.

The components of white light bend when they pass through a glass prism. The extent of bending of each component is dependent on the wavelength of each color.

Red light has the longest wavelength and is thus refracted the least while violet with the shortest wavelength is refracted the most.

More on refraction can be found here:https://brainly.com/question/14760207

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In the levels of organization of plants, What are the 2 tissues and their functions?

Answers

Vascular tissue transports water, minerals, and sugars to different parts of the plant. Vascular tissue is made of two specialized conducting tissues: xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a role in structural support in the stem.

Rate of diffusion of hydrogen, compared with the gases of air?
Explain your answer using the term mass

Answers

Answer:

Graham's law states that the rate of effusion or of diffusion of a gas is inversely proportional to the square root of its molecular weight. So, rate of diffusion of hydrogen gas is four times faster than oxygen gas.

Explanation:

Answer:

Rate of diffusion of hydrogen is higher than other gases because mass of hydrogen is very small and it diffuses easily.

Explanation:

of what does sand consist​

Answers

The most common component of sand is silicon dioxide in the form of quartz. Simple version just broken down rocks and minerals.

Answer:

like ground rocks and shells I think.

Explanation:

how many energy levels does a sodium atom have?

Answers

the element sodium has 1,000,000 million energy levels. in an electrically neutral sodium atom- there are 3 energy levels.

Answer:

Sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons and one electron remaining in the outer energy level. It is the number of outer electrons that give an element its chemical properties.

Explanation:

write the balanced equation for the formation of carbon dioxide.

Answers

C + O2 ——> CO2
Carbon plus oxygen forms carbon dioxide

write and balance the cellular respiration equation of glucose compared with the photosynthesis reaction in the terms of reactants products energy flow in the significance of each. ​

Answers

Answer:

Explanation:

.

write the condensed, complete, and net ionic equations for any reaction that occurs between K2CrO4(aq) and Fe(NO3)3(aq).

Answers

Answer:

Condensed equation:  [tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]

Complete ionic equation : [tex]6K^+(aq)+3CrO_4^-(aq)+2Fe^{2+}(aq)+6NO_3^-(aq)\rightarrow Fe_2(CrO_4)_3(s)+6K^+(aq)+6NO_3^-(aq)[/tex]

Net ionic equation :   [tex]3CrO_4^-(aq)+2Fe^{2+}(aq)\rightarrow Fe_2(CrO_4)_3(s)[/tex]

 Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

The balanced chemical equation is:

[tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]

Condensed equation : [tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

[tex]6K^+(aq)+3CrO_4^-(aq)+2Fe^{2+}(aq)+6NO_3^-(aq)\rightarrow Fe_2(CrO_4)_3(s)+6K^+(aq)+6NO_3^-(aq)[/tex]

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.  Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

[tex]3CrO_4^-(aq)+2Fe^{2+}(aq)\rightarrow Fe_2(CrO_4)_3(s)[/tex]

 

How many atoms are in 5.62 moles of Mercury?

Answers

Answer:

3.384364 time 10^24 atoms

Explanation:

multiply by avogadro's number

what is 10x20=???????????? I NEEED HELP

Answers

Answer:

The answer for 10 times 20 is 200

Explanation:

Why... Because what is 1 times 2=2 so add the left over zero I'm that your answer!

which of these is an example of a chemical change?

Answers

Answer:

No answer choices but Chemical changes are changes in which can't be undone an example would be a rotting food(won't be fresh ever again) or burning paper(ashes are ashes not paper)

Explanation:

Hope this helps :D

Question 5
U
4 pts
Picture a neutral Na atom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be

Answers

Answer:

it will have 1 valence electron as its in the first group in the periodic table.

It will lose electrons as its easier.

The charge will be 1+ as it lost 1 .

please help me asap! (brainliest)

Answers

Answer:

Es so es na formula pero te balto la convinasiones de la formula

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