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Fiesta28 [93]
3 years ago
14

Is quartz considered a mineral or ore?

Chemistry
2 answers:
Andrej [43]3 years ago
7 0

Quartz is a mineral.

eimsori [14]3 years ago
5 0

Answer:Quartz is a meniral

Explanation:

Quartz is composed of oxygen and silicon.it is a pure form of silica

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How do the products of chemical reactions compare to their reactants?
Ket [755]

The products of chemical reactions often have completely different properties than the reactants, like viscosity, boiling and melting temperatures, etc.

That is because the atoms form new and different bonds to give the products.

8 0
1 year ago
What are the solutions to the equation x2 + 4x + 5 = 0?​
dusya [7]

Answer:

-1, -4

Explanation:

x^2+4x+5=0

Factoring, you get:

(x+4)(x+1)=0

To find what x can be, you need to realize what could make this equation true. To set the left side equal to 0, either one of the terms in parentheses must be equal to 0. To do that, x must be the negative of the other term, so that they can cancel each other out. Therefore, x is -4 and -1. Hope this helps!

4 0
3 years ago
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What happens when the temperature of a solution increases?
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Answer:

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3 years ago
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What is true when a reaction has reached equilibrium?
KATRIN_1 [288]

Answer:

The concentration of the products and reactants is constant.

Explanation:

Once the reversible reaction that proceeds forward and backward simultaneously has reached it's state of chemical equlibrium, the concentration of products and reactants become constant.

This means that the rate at which the reactants react to form products becomes equal to the rate at which products react to form the reactants again. At this point there will be no further change in the concentration of reactants and products with time. In chemical equilibrium the concentration of a reactant or a product is expressed in moles per cubic decimeter ( mol / dm^3.

3 0
3 years ago
Why does ionization energy decrease down a group?
german
Ionization energy = the amount of energy it takes for an atom to lose an electron

Remember that the nucleus is positively charged and the electrons are negatively charged. Because those opposite charges attract, the nucleus is pulling the electron towards it and so, the closer an electron is to the nucleus of an atom, the stronger it is being pulled.

Now remember that as more electrons are added to match the number of protons, the shells fill up and each new shell that is made to accommodate for the electrons is further away from the nucleus. That means that the more electrons are in an atom, the more shells there are, and as the shells get further away from the nucleus, the electrons in those shells are pulled with much less force than electrons in the closer shells.

Now all that's left to remember is that as you go down the groups, the elements have bigger numbers of protons and so they have more electrons and so more shells.

Ta da!! Hope that helps!! :D
3 0
3 years ago
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