CHEMISTRY HIGH SCHOOL

Can someone tell me about kinetic, potential, and gravitational energy?

Answers

Answer 1
Answer:

Answer:

the internet can teach you alot about all 3 things

Explanation:
Answer 2
Answer:

Answer:

if you go on YT and search  kinetic, potential, and gravitational energy their will be a bill nye vid that is very informational on the topic at hand!!!

Explanation:

hope this helps!!

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What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g

Answers

To get the percent yield, we will use this formula: ((Actual Yield)/(Theoretical Yield)) * 100% Values given: actual yield is 220.0 g theoretical yield is 275.6 g Now, let us substitute the values given. (220.0 grams)/(275.6 grams) = 0.7983 Then, to get the percentage, multiply the quotient by 100. 0.7983 (100) = 79.83% Among the choices, the most plausible answer is 79.8%
If the actual yield of ferrous sulfide is 220.0 g and its theoretical yield is 275.6 g, the percent yield of ferrous sulfide is 79.8%. Make a proportion. 220.0 g is x percent. 275.6 g is 100%. 220.0 g : x = 275.6 g : 100%. After crossing the products: x = 220.0 g * 100% : 275.6 g = 79.8%

Marshall determines that a gas has a gage pressure of 276 kPa. What's the absolute pressure of this gas? A. 326 kPa
B. 156 kPa
C. 376 kPa
D. 176 kPa

Answers

Answer: The absolute pressure is 376 kPa.

Explanation :

The absolute pressure of a gas is defined as the sum of gauge pressure and the atmospheric pressure.

We know that the atmospheric pressure of a gas is 101.3 kPa.

So, Absolute pressure becomes 276 kPa + 101.3 kPa = 377.3 kPa

Approximately it can be written as, 376 kPa.

So, the correct option is (C) " 376 kPa ".

Hence, this is the required solution.

C.... 376 tbh just took the test and was right

Why is CCl4 a nonpolar molecule, but PCl3 is a polar molecule?

Answers

The CCl₄ molecule has a tetrahedral geometry. It is a symmetrical molecule. The polarised bond thus cancels out each other due to the geometry of the molecule and that is why CCl₄is nonpolar.

Chlorine has a higher electronegativity than phosphorous. As a result, the chlorine atom has a partial negative charge relative to phosphorous. Since all three chlorine atoms pull electrons from the phosphate atom, the molecule is a polar molecule.

The reason why CCl₄is not soluble in water is because it is not soluble in polar solvents. Both PCl₃ and water are polar molecules. This is due to their shape and the electronegativity difference between the H and O molecules in water and the P and Cl molecules in PCl₃. Therefore, PCl₃in water is soluble.

To learn more about the tetrahedral geometry, refer to the link:

brainly.com/question/10827811

#SPJ6
If you follow the octet rule, you know that an element must have 8 outside (or valence) electrons to be energetically favorable.

In CCl4, the carbon molecule forms four bonds; one for each chlorine atom. Each bond contains 2 electrons, so it is satisfied.

In PCl3, Phosphorous forms only 3 bonds with chlorine, which means in order to have 8 valence electrons, it also has a lone pair of electrons, not bonded with chlorine.

Now, in CCl4, picture the shape of the molecule like a plus sign, with the carbon in the middle and the chlorine at the four ends. It is symmetrical, and therefore is nonpolar.

In PCl3, the lone pair electrons push, so to speak, the 3 chlorine atoms away, making a T-shaped molecule.  Since the chlorine is more electronegative than carbon, the molecule is unbalenced, making it polar.

In Rutherford’s gold foil experiment, many of the alpha particles passed straight through the gold foil, completely undeflected. What did Rutherford conclude from this observation? A. Alpha particles have a positive charge.

B. Electrons have a negative charge.

C. An atom is made up of mostly empty space.

D. There is a dense area within an atom that has a negative charge.

Answers

Answer: C

Explanation:

Rutherford's Gold Foil Experiment

These were his conclusions.

  • Aimed beam of alpha particles at a thin piece of gold foil and found most of the particles passed through the gold foil without being scattered, except for a few particles.
  • He found the volume of an atom is mostly empty space.
  • He proposed there is a heavy, positively charged body at the center of each atom that contains most of the mass.
  • Electrons are throughout the atom.
  • Number of electrons outside the nucleus equals the number of protons in the nucleus. Atom is electrically neutral.

Which statement describes a concept included in the wave-mechanical model of the atom?

Answers

The wave-mechanical model of the atom was proposed by Erwin Schrodinger that combined the works of Bohr and de Broglie. The electron was a three dimensional wave circling the nucleus in a whole number of wavelengths allowing the waveform to repeat itself as a stable standing wave (it can absorb energy form a nearby source which is oscillating at a proper frequency) representing the energy levels of Bohr model. He also said that Broglie’s model was correct about the matter waves and the electrons are located in the atomic space according to standing wave frequencies.

If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 liters, what is the temperature?

Answers

Okay so according to the formula PV=nRT
n=4
P=5.6 atm
V=12 L
R=0.08206 L atm mol-1 K-1
T=?
So, if you plug it in, you will get:-

T=PV/nR
T=(5.6 atm)(12 L)/(4 mol)(0.08206 L atm mol-1 K-1)
T=204.73 K

Hope I'm right! :)

Answer:

PV=nRT

Explanation:

T=PV/nR

P=5.6atm n= 4 mol V=12 L R =.082Latm/K mol

T= (5.6 atm)(12 L)/(4 mol)(.082Latm/K mol)

T = 205 K = -68 C
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