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JulijaS [17]
3 years ago
8

CAN SOMEONE PLEASE HELP ME!!!! I CAN'T GET ANY HELP IN THE SCIENCE SECTION!!!!!

Chemistry
2 answers:
stepan [7]3 years ago
8 0
A chemical property would have to be something that changes and produces new substances. That is one of the main aspects of chemical changes/properties.

Heating an object to determine it's melting point is a physical property.

Shining a bright lighr and testing for decomposition however may be classifieds as a chemical properties because in the process of decomposition, organic substances are being broken. In physical properties, substances are not being broken.
lorasvet [3.4K]3 years ago
6 0
Answer: shining a bright light on the object and testing for decomposition

Decomposition is the separation of a molecule into its elements or simpler compounds.

And a chemical property is the ability of a substance to combine or to become one or more substances.

Then, testing the ability of an object for decomposition is testing a chemical property.

 

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What is the energy of a TV wave that NBC broadcasts, if it has a wavelength of 32 meters?
serg [7]

Answer:

Explanation:

E = hc/λ

h = planck's constant = 6.66 x 10 ^ -34

c = speed of light = 2.98 *10^8 m/s

E = (6.66 x 10 ^ -34 )(2.98 *10^8)/32

  = 19.85 * 10 ^-26

   =0.62 x 10^-26

   = 6.2 x 10^-27 J

8 0
2 years ago
Miranda gets a small cut on her thumb after she breaks a beaker, and she begins to look around for the lab first aid kit.
sleet_krkn [62]

Answer:

She should have first notified the teacher.

3 0
2 years ago
What is the concentration, in grams per liter, of a solution prepared by dissolving 0.00040 mol HCl in 2.2 L H2O? Assume that th
Zolol [24]

Answer:

0.00663 grams/liter

Explanation:

HCl is a mineral acid with a molar mass of 36.46 g/mol.

No. of moles= mass/RMM

Making mass the subject of the formula:

Mass=Number of moles × RMM

Therefore 0.00040 mol HCl has a mass of:

0.00040 mol × 36.46 g/ mol

=0.01458 grams.

0.01458 grams are in 2.2 liters, Therefore 1 liter will have

0.01458 grams/2.2 liters= 0.00663 grams

concentration= 0.00663 grams/liter

4 0
3 years ago
Read 2 more answers
Which factors are used to calculate the connetic energy of an object?
lora16 [44]
<span>You can use physics to calculate the kinetic energy of an object. When you start pushing or pulling a stationary object with a constant force, it starts to move if the force you exert is greater than the net forces resisting the movement, such as friction and gravity. If the object starts to move at some speed, it will acquire kinetic energy.So how do you calculate kinetic energy?A force acting on an object that undergoes a displacement does work on the object. If this force is a net force that accelerates the object (according to Newton’s second law), then the velocity changes due to the acceleration. The change in velocity means that there is a change in the kinetic energy of the object.The change in kinetic energy of the object is equal to the work done by the net force acting on it. This is a very important principle called the <span>work-energy theorem. </span>After you know how work relates to kinetic energy, you’re ready to take a look at how kinetic energy relates to the speed and mass of the object.The equation to find kinetic energy,<span> KE,</span> is the following, where m is mass and v is velocity:Using a little math, you can show that work is also equal to (1/2)mv2. Say, for example, that you apply a force to a model airplane in order to get it flying and that the plane is accelerating. Here’s the equation for net force:F = maThe work done on the plane, which becomes its kinetic energy, equals the following:Net force F equals mass times acceleration. Assume that you’re pushing in the same direction that the plane is going; in this case, cos 0 degrees = 1, soW = Fs = masAssuming constant acceleration, you can tie this equation to the final and original velocity of the object. Use the equationwhere<span> v</span>f equals final velocity and vi equals initial velocity. Solving for a gives youIf you plug this value of a into the equation for work, W = <span>mas, </span>you get the following:If the initial velocity is zero, you getThis is the work that you put into accelerating the model plane — that is, into the plane’s motion — and that work becomes the plane’s kinetic energy, KE:This is just the work-energy theorem stated as an equation.You normally use the kinetic energy equation to find the kinetic energy of an object when you know its mass and velocity. Say, for example, that you’re at a firing range and you fire a 10-gram bullet with a velocity of 600 meters/second at a target. What’s the bullet’s kinetic energy? Using the equation to find kinetic energy, you simply plug in the numbers, remembering to convert from grams to kilograms first to keep the system of units consistent throughout the equation:</span><span>The bullet has 1,800 joules of energy, which is a lot of energy to pack into a 10-gram bullet.

Hope this helps!!!!!</span>
3 0
3 years ago
What is the I.U.P.A.C. name of this<br> c2h5-o-ch2-c(ch3)3?
Alja [10]

Answer:

1-ethoxy-2,2-dimethyl-propane

Explanation:

common name

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3 0
3 years ago
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