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DanielleElmas [232]
3 years ago
6

How many moles are in 13.5g of calcium?

Chemistry
1 answer:
antiseptic1488 [7]3 years ago
3 0

Answer:

=0.337mol Ca this is the correct answer :)

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How did the uncertainty principle influence thinking about the arrangement of electrons in atoms?
pishuonlain [190]

Answer:

The correct answer is option C

Explanation:

According to Heisenberg's principle "At the instant of time when the position is determined, that is, at the instant when the photon is scattered by the electron, the electron undergoes a discontinuous change in momentum. This change is the greater the smaller the wavelength of the light employed, i.e., the more exact the determination of the position. At the instant at which the position of the electron is known, its momentum therefore can be known only up to magnitudes which correspond to that discontinuous change; thus, the more precisely the position is determined, the less precisely the momentum is known".

Hence, this principle made scientists to realize that electrons could not be located in defined orbits which a contradictory of Bohr's model.

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Is a computer screen energy transfer or transformation?
yarga [219]
A computer screen is energy transfer
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Elena held a rock weighing 1 N in her hand. The rock has no velocity. <br> KE________?
nignag [31]

KE = 0

<h3>Further explanation  </h3>

Energy is the ability to do work  

Energy because its motion is expressed as Kinetic energy (KE) which can be formulated as:  

\large{\boxed{\bold{KE=\frac{1}{2}mv^2}}}

So for two objects that have the same speed, the greater the mass of the object, the greater the kinetic energy  

The stone in hand is in a motionless state (at rest) so that its velocity (v) = 0, so it has no kinetic energy

But this stone can have <em>potential energy that is gained due to its height</em>

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If the temperature is 80° outside does the air transfer more or less thermal energy to a thermometer then if it is 60°
kati45 [8]
Less, because thermal energy is heat so if it gets colder there is less thermal energy.
6 0
3 years ago
Read 2 more answers
you have a 500g block of butter at home. You found out that its volume its 555l. What is the density of the butter?
Ivenika [448]
Density will be 0.9009 g/L
7 0
3 years ago
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