CHEMISTRY MIDDLE SCHOOL

Is bro2 polar or nonpolar​

Answers

Answer 1
Answer: Bro2 is polar because the rules for overall polarity of Neutral Species Arrangement of Group Linear Trigonal Planar Tetrahedral Trigonal Bipyramidal Octahedral Polarity if atoms on either side of the center atom are different, the species is polar if any group around the central atom is different.

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What is a chemical property

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any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.
Material's feature  that becomes visible in a chemical reaction.

How can you demonstrate that a piece of chalk has mass?

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You can demonstrate that a piece of chalk has mass by putting it on a pan scale. Pan scales determine mass in grams. Also if the mass feels like it has some weight to it (although not to be confused with weight, they are two different things!), it most likely has mass.
Hope this helps!!

A piece of titanium metal has a massive 67.5 g no volume of 15 cm³ what is the density of the titanium

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Answer:

3.4

Explanation:

How does a magnet separate mixtures?

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It can only do that when  one of the components of the mixture is a magnetic
material.

When you have that situation, you pass the magnet over the mixture ... shaking
the mixture if it's a dry mixture of powders or pieces ... and the magnetic part of
the mixture moves toward the magnet, while the nonmagnetic parts of the mixture
couldn't care less about the magnet and they just stay where they are.
It will separate when one of the elements found in the mixture is magnetic. This process can't be done in a compound as a compound is chemically bonded!

Explain why atoms move at different speeds depending on whether they are liquids or solids.

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The space between the particles allows them to do so. 

Example, a solid's particles are squished together, so it appears as a solid shape. 

What is happening within the system when it is at equilibrium in terms of concentration, reactions that occur, and reaction rates? 2CH4(g) <--> C2H2(g) + 3H2(g)

Answers

Answer and Explanation:

It is worthy to be mentioned that the equilibrium in this reaction is dynamic equilibrium.

  1. In terms of concentration: the concentration of reactants (CH4) and products (C2H2 & H2) do not change and be constant at the equilibrium, that 2 moles of CH4 give one mole of C2H2 and 3 moles of H2.
  2. In terms of reactions that occur: the reactions that occur at the equilibrium are the forward and the reverse reaction. The forward reaction: 2CH4 → C2H2 + 3H2 and the reverse reaction: C2H2 + 3H2 → 2CH4.
  3. In terms of reaction rates: At equilibrium the rate of the forward reaction is equal to the rate of the reverse reaction.

Answer:

In a chemical reaction equilibrium is in the state which reacts with both products and reactants.  Both reverse and forward are happening and both reaction rates forward and reverse are equal.  

Explanation:

This is what i put and i got it right.
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