1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mamaluj [8]
3 years ago
10

Sodium fluoroacetate (NaO₂C₂H₂F) is a common poison used in New Zealand to control invasive species, such as rats. It can be pre

pared by the substitution of a C-Cl bond in sodium chloroacetate (NaO₂C₂H₂Cl) for a C-F bond. What is the approximate enthalpy change for this substitution reaction on a 1.500 mole sample, based on the following bond energies?
C-Cl = 339.0 kJ/mol
C-F = 485.0 kJ/mol
Chemistry
1 answer:
NISA [10]3 years ago
7 0

Answer:

-219

Explanation:

1.5(339) - 1.5(485) = -219

You might be interested in
SOMEONE PLEASE HELP I WILL GIVE YOU BRAINLIEST IF YOU GET IT RIGHT.
VladimirAG [237]

Answer:

A (H)

Explanation:

The key uptop shows all the red are non metal and "H: is pink

6 0
3 years ago
What is meant by “normal” when you are asked for normal boiling and melting points?
RideAnS [48]

Answer:

Normal boiling point is the temperature at which a liquid boils at 1 atmosphere of pressure.

Explanation:

8 0
3 years ago
How many atoms are in 5.62 moles of Mercury?
Maslowich

Answer:

3.384364 time 10^24 atoms

Explanation:

multiply by avogadro's number

4 0
2 years ago
Solve the following problems on ideal gas equation. Practice makes perfect.
photoshop1234 [79]

Answer:

0.012mol

Explanation:

1.

Given parameters:

Pressure in the balloon  = 1.25atm

Volume of the balloon  = 2.5L

Unknown:

Number of moles  = ?

Solution:

We are going to used the combined gas law to solve this problem.

  PV = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmdm³mol⁻¹K⁻¹

 Insert the parameters and solve;

    1.25 x 2.5  = n x 0.082 x 285

       n  = 0.13mol

The number of moles is 0.13mol

2.

Given parameters:

Pressure  = 16torr;

   to atm is ;

                 760torr  = 1atm

                  16torr = \frac{16}{760}   = 0.02atm

Volume = 12L

Temperature  = 253K

Using the ideal gas law;

        PV  = nRT

       0.02x12  = n x 0.082 x 253

            n = 0.012mol

           

7 0
2 years ago
1.Take a 10-15 minute walk around your house, yard, neighborhood, etc.
jasenka [17]

The classification of observed objects in the neighborhood based on the change process (chemical or physical) involved in their formation are;

Chemical

  1. Plastic chair
  2. Fire
  3. Plastic bags
  4. Glass
  5. Iron rust
  6. Cement on plastered wall
  7. Exhaust from a moving truck
  8. Electric generators engines in operation and becoming hot

Physical

  1. Ice
  2. Water
  3. Cooking gas
  4. Fabrics cleaned using detergent powder
  5. Wooden furniture
  6. Colored clothes
  7. Sand
  8. Oil used for deep frying

<h3>What are the characteristics of chemical and physical change?</h3>

The objects observed are;

1. Plastic chair

2. Sand

3. Water

4. Ice

5. Cooking gas

6. Fire

7. Wooden furniture

8. Plastic bags

9. Glass

10. Colored clothes

11. Clothes, cleaned using detergent

12. Rusted iron

13. Plastered wall (with cement)

14. Oil used to deep fry food

15. Truck engines exhaust containing soothe

16. Electricity generators becoming hot after running for a while and producing exhaust gases from liquid fuel

Classification of the above listed items according to the change processes they undergo, (chemical or physical change process), we have;

Items that are formed through a chemical change process includes;

1. Plastic chair

2. Fire

3. Plastic bags

4. Glass

5. Iron rust

6. Cement on plastered wall

7. Exhaust from a moving truck

8. Electric generators engines in operation and becoming hot.

Items that are formed through a physical change process includes.

1. Ice

2. Water

3. Cooking gas

4. Fabrics cleaned using detergent powder

5. Wooden furniture

6. Colored clothes

7. Sand

8. Oil used for deep frying

The classification into objects formed through chemical and physical process is based on the following observable characteristics, including;

Chemical change process characteristics includes;

  • Gas formation
  • Color characteristics change
  • Precipitate formation in the process
  • Observable temperature change
  • Change in odor

Characteristics of a physical change process includes;

  • Reversibility of the observed change
  • Lack of liberation of energy, in the form of heat, light, or sound
  • The chemicals or materials involved in the process do not change
  • The materials involved in the start are the same as those observed after the change. No new substance are formed
  • Change in form such as from liquid to solid.

Learn more about chemical and physical change here:

brainly.com/question/20689999

#SPJ1

5 0
1 year ago
Other questions:
  • Elements in the periodic are listed according to
    10·1 answer
  • Determine whether or not the equation below is balanced. If it isn’t balanced, write the balanced form. Also, identify the react
    11·2 answers
  • Do you expect potassium iodide to be soluble in cyclohexane
    12·2 answers
  • Where do producers get matter and energy to live and grow ?
    12·1 answer
  • How many molecules are in 1 mole of H2O molecules?
    10·1 answer
  • What is instantaneous acceleration?A. how fast a speed is changing at a specific instant B. how fast a velocity is changing at a
    11·1 answer
  • __C2H4+__O2--&gt;__CO2+__H2O
    10·1 answer
  • Why does 50 g of copper require less heat (q) than 50 g of water, in order to raise the temperature by 15 oC? (Hint - the heat c
    9·1 answer
  • In the lab, a 156 g sample of unknown compound KClOx was completely decomposed to produce 50.4 L of O2 (g) at STP and an unknown
    7·1 answer
  • What is the mass in grams of 8.65 mol C8H18?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!