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Mazyrski [523]
3 years ago
9

What is electropositivity and electronegativity? Between group 1 and group 17, which is electropositive and electronegative?

Physics
1 answer:
marishachu [46]3 years ago
3 0
Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons towards the nucleus. Electropositivity on the other hand is <span>a measure of an element's ability to donate electrons. Group 1 is a group of metals hence they are electropositive while group 17 is electronegative</span>
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At 1 atm pressure, the heat of sublimation of gallium is 277 kj/mol and the heat of vaporization is 271 kj/mol. to the correct n
Andreyy89
Below are the choices that can be found elsewhere:

 a. 268 kJ 
<span>b. 271 kJ </span>
<span>c. 9 kJ </span>
<span>d. 6 kJ
</span>
So the key thing to realize here is what the information given to you actually means. Sublimation is going from a sold to a gas. Vaporization is going from a liquid to a gas. Hence you can create two equations from the information that you have: 

<span>Ga (s) --> Ga (g) delta H = 277 kJ/mol </span>

<span>Ga (l) --> Ga (g) delta H = 271 kJ/mol </span>

<span>From these two equations, you can then infer how to get the melting equation be simply finding the difference between the sublimation (two steps) and vaporization (one step). </span>

<span>Ga (s) --> Ga (l) delta H = 6 kJ/mol </span>

<span>At this point, all you need to do is a bit of stoichiometry. You start with 1.50 mol and multiply by the amount of energy per mole (6 kJ/mol). </span>

<span>*ANSWER* </span>
<span>9 kJ/mol (C)</span>
7 0
3 years ago
0.0084x91 ...................
Drupady [299]

Answer:

0.0084×91=0.7644

Explanation:

hope this helps

8 0
3 years ago
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you can make a smoothie in a blender with a power of 400 W and an efficiency of 85% how much energy is actually being used to ma
bixtya [17]
1200  watt seconds
1.2.  Kw seconds
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5 0
3 years ago
In an oscillating LC circuit, the total stored energy is U and the maximum current in the inductor is I. When the current in the
Deffense [45]

Answer:

The definition of that same given problem is outlined in the following section on the clarification.

Explanation:

The Q seems to be endless (hardly any R on the circuit). So energy equations to describe and forth through the inducer as well as the condenser.  

Presently take a gander at the energy stored in your condensers while charging is Q.

⇒  U =\frac{Qmax^2}{C}

So conclude C doesn't change substantially as well as,

When,

⇒  Q=\frac{Qmax}{2}

⇒  Q^2=\frac{Qmax^2}{4}

And therefore only half of the population power generation remains in the condenser that tends to leave this same inductor energy at 3/4 U.

5 0
3 years ago
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Alchen [17]
It might help if this is in the biology area but i'll answer anyways. Your answer is C. Every environment has living and nonliving things.  Tree, plants, animals, grass, tree bark, water, etc.
8 0
3 years ago
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