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
miskamm [114]
4 years ago
9

1- Define Exothermic reaction

Chemistry
1 answer:
Amiraneli [1.4K]4 years ago
3 0
1. Exothermic reactions are reactions that release energy into the environment in the form of heat.

2. Exothermic reactions feel warm or hot or may even be explosive. A simple example of an exothermic reaction is combustion, such as lighting a candle. An initial input of energy causes oxygen and wax react to produce carbon dioxide, water, and heat.

3. An endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat.

4. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes.
You might be interested in
How many molecules are in 1.95 moles of water?
OLEGan [10]
Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules<span> of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g . 2.7144moles H2O ⋅</span>6.022<span>⋅1023molec.1mole H2O =1.635⋅1024molec.</span>
3 0
3 years ago
Read 2 more answers
3.25 x 10+8 nm2 divide by 6.5 x 10+6 nm =
Vesnalui [34]

Answer:  50 nm

Explanation:  Two steps:

1.  Divide 3.25/6.5 = 0.5

2.  Divide 10^8/10^6 = 10^2

nm^2/nm = nm

Combine:  0.5x10^2 nm

or 50 nm

8 0
3 years ago
Predict whether each of the following molecules is polar or nonpolar? 1. XeF4 3. CCl4 5. CH3Br
denpristay [2]
The answer the following are as follows:

<span> 1. XeF4 - molecules are polar

3. CCl4 -  molecules are polar

5. CH3Br - molecules are non-polar

 I hope my answer has come to your help. God bless and have a nice day ahead!</span>
5 0
4 years ago
What is the mass, in pounds, of 389 mL of a gas that has a density of 1.29 g/L?
devlian [24]

Answer: Mass of gas is 0.001 pounds.

Explanation:

Density is defined as the mass contained per unit volume.

Density=\frac{mass}{Volume}

Given : Mass of gas = ?

Density of gas = 1.29g/L

Volume of gas = 389 ml = 0.389 L     (1L=1000ml)

Putting in the values we get:

1.29g/L=\frac{mass}{0.389L}

mass=0.5grams  

mass=0.5\times 0.002lb=0.001lb       (1g =0.002 lb)

Thus the mass of gas is 0.001 pounds.

7 0
3 years ago
How many moles of LiOH are required to prepare 1.50L of 5.4 M LiOH?
Snezhnost [94]
You would need 8.1 <span>moles of LiOH</span>
6 0
3 years ago
Other questions:
  • You can determine the molecular formula of a compound by knowing answer
    5·1 answer
  • PLEASE HELP I'M STUCK
    9·2 answers
  • You use a 15.0 gram piece of aluminum foil to cover a pan in the oven. The specific heat for aluminum is c = 0.900 J/g o C. If t
    11·2 answers
  • Identify each type of titration curve. note that the analyte is stated first, followed by the titrant.
    14·1 answer
  • What could you do to increase the volume of the gas in a jar?
    7·2 answers
  • N2O4(g) 2NO2(g) Which of the following represents the Keq value? 0.18 0.0067 0.131 0.0046
    12·1 answer
  • 5. Azulene is a beautiful blue hydrocarbon. If 0.106 g of the compound is burned in oxygen, 0.364 g of CO2 and 0.0596 g of H2O a
    11·1 answer
  • Concentration is the amount of material dissolved in a measure of liquid?<br> true or false
    8·1 answer
  • Name the ionic compound NH4NO3
    9·1 answer
  • What are the significance of metals in human life and civilization?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!