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
zimovet [89]
2 years ago
5

My science exam is due tomorrow and I HAVE LIMITED TIME. can someone help me how to absorb anything you read and memorize it...

Chemistry
1 answer:
igor_vitrenko [27]2 years ago
7 0

Answer:  

It won't let me type this for some reason but here it is.

You might be interested in
What is the frequency of a photon with an energy of 3.26 x 10-19 J?
Kobotan [32]

Answer:

B.

from \: eisteins \: energy \: relation :  \\ E = hf  \\ h \: is \: plancks \: constant\\ 3.26 \times  {10}^{ - 19}  = 6.63 \times  {10}^{ - 34 }  \times f \\ f =  \frac{3.26 \times  {10}^{ - 19} }{6.63 \times  {10}^{ - 34} }  \\ f = 4.92 \times  {10}^{14}  \: Hz

8 0
2 years ago
At room temperature, which of these are oxide minerals? Select all that apply.
DerKrebs [107]
C. and d. are oxyminerals.
7 0
3 years ago
Read 2 more answers
How does water heat earth
vovikov84 [41]
The answer is the 3rd one down I think
6 0
3 years ago
Explain the three types of cumbusion ??​
Alik [6]

Answer:

Complete Combustion

One of the types of combustion is Complete Combustion. Complete combustion occurs in an unlimited supply of air, oxygen in particular. Also, complete combustion is also known as clean combustion. Here the hydrocarbon will burn out completely with the oxygen and leave only two byproducts, water, and carbon dioxide.

An example of this is when a candle burns. The heat from the wick will vaporize the wax which reacts with the oxygen in the air. The two products of the reaction are water and carbon dioxide. In an ideal situation all the wax burns up and complete combustion takes place

2] Incomplete Combustion

Incomplete combustion takes place when the air is in limited supply. And as opposed to complete combustion it is otherwise known as dirty combustion. Due to lack of oxygen, the fuel will not react completely. This, in turn, produces carbon monoxide and soot instead of carbon dioxide.

An example is burning of paper. It leaves behind ash (a form of soot) as a byproduct. In a complete combustion, the only products are water and carbon dioxide. Also, incomplete combustion produces less energy than complete combustion.

3] Rapid Combustion

Another type of combustion is Rapid Combustion. Rapid energy needs external heat energy for the reaction to occur. The combustion produces a large amount of heat and light energy and does so rapidly. The combustion will carry on as long as the fuel is available.

An example is when you light a candle. The heat energy is provided when we light the candle with a matchstick. And it will carry on till the wax burns out. Hence it is a rapid combustion

4] Spontaneous Combustion

As the name suggests the combustion occurs spontaneously. This means that it requires no external energy for the combustion to start. It happens due to self-heating. A substance with low-ignition temperatures gets heated and this heat is unable to escape.

The temperature rises above ignition point and in the presence of sufficient oxygen combustion will happen. The reaction of alkali metals with water is an example.

5] Explosive Combustion

Explosive Combustion happens when the reaction occurs very rapidly. The reaction occurs when something ignites to produce heat, light and sound energy, The simple way to describe is it to call it an explosion. Some classic examples are firecrackers or blowing up of dynamite.

6 0
2 years ago
What controls traits in organisms? A.Cell Membrane B.Cell Wall C.Genes D.Punnett Square
BARSIC [14]

Answer:

I believe it's C (the genes)

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the mass (in grams) of 9.42 × 1024 molecules of methanol (CH3OH)?
    15·2 answers
  • Is NaF an acid, base or salt?
    8·2 answers
  • Calculate the mass of a liquid with a density of 3.2 g/ml and a volume of 25 ml
    14·1 answer
  • Combustion analysis of toluene, a common organic solvent, gives 7.03 mgmg of CO2 and 1.64 mgmg of H2O. If the compound contains
    9·1 answer
  • Write an equation for the reaction in which h2c6h7o5- acts as a base
    13·1 answer
  • Which term describes the materials magma is made of?
    9·2 answers
  • The original list from the Stockholm Convention on Persistent Organic Pollutants (POPs) of 12 hazardous chemicals, called the __
    12·1 answer
  • What is the specific heat of copper when heated to 221.32
    9·1 answer
  • 100 points please help me will also mark brainliest!
    11·2 answers
  • If I have 4.5 liters of gas at a temperature of 33 0C and a pressure of 6.54 atm, what will be the pressure of the gas if I rais
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!