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lara31 [8.8K]
3 years ago
15

HELP DUE MONDAY!! Don’t understand

Chemistry
1 answer:
Katyanochek1 [597]3 years ago
5 0

Answer:

Concept: Chemical Analysis

  1. You need to start by graphing the data and then analyzing it.
  2. We can see that the horse has a distance in meters of 980 at the end of the 10 seconds hence it is the fastest.
  3. The horse line has a linearly representation, while the alternate line has parabolic tendencies towards the end. The steeper line indicates a faster change in time or velocity which results in a greater distance traveled indicating that the horse is faster.
  4. *I have confidence you can graph that*
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For the first ionization energy for an N2 molecule, what molecular orbital is the electron removed from
olga55 [171]

Answer:

p orbital.

Explanation:

Valence electrons are the electrons in an atom holding the very last orbital which is used in chemical bonding with other elements. Their existence could define the chemical properties of that atom.

During the first energy in ionization of an N2 molecule the molecular orbital from which the electron could be extracted is the only one with the highest energy level. Nitrogen has its outermost orbital (p) containing three valence electrons. Each orbital is only half filled, and thus it is unstable Thus, the electron mission must have been removed from p orbital.

7 0
3 years ago
Mercury can be obtained by reacting mercury(ii) sulfide with calcium oxide. how many grams of calcium oxide are needed to produc
Lelechka [254]
Reaction between mercury (ii) sulfide with Calcium oxide is as shown;
 4 HgS +4 CaO = 4 Hg + 3 CaS + CaSO4 
The molar mass of HgS is 232.66 g/mol
 The number of moles = 31.28/232.66
                                    = 0.1344 moles
The mole ratio of HgS : CaO is 1: 1
Therefore, the number of moles of Calcium oxide is 0.1344 moles
1 mole of CaO Contains 56 g/mol
Thus, the mass of CaO is 56 g/mol
         = 0.1344 moles × 56 g/mol
         = 7.5264 g

8 0
3 years ago
Read 2 more answers
When bromobenzene reacts with propene in a heck reaction (in the presence of pd(php3)4 and et3n) , two constitutional isomers ar
marysya [2.9K]
The Heck reaction is a coupling reaction that combines an unsaturated halide with an alkene in the presence of base and palladium catalyst to provide a substituted alkene. It an important reaction as it forms a carbon-carbon bond and allows substitution on sp² hybridized carbons.

In this example, we have bromobenzene reacting with propene and are told that two constitutional isomers are formed. The expected product is the first one shown which has the benzene substitute onto the terminal end of the alkene. The isomer by-product that is formed is substitution onto the central carbon of the propene which leads to a product with a terminal alkene.

7 0
3 years ago
What happens when a substance undergoes a physical change? Some physical properties change, but the substance keeps its identity
elena55 [62]
Some physical properties change, but the substance keeps its identity.

When dealing with these kind of questions, understand that the keyword here is physical change. Thus, all options that says no physical properties change are WRONG. So this leaves us with only 2 answers left. However, this is a physical change, no chemical change. Thus, the substance will keep its identity and not change.

8 0
3 years ago
Read 2 more answers
SCIENCEEEE!!!! I NEED HELPPP
valina [46]
These are both physical changes can I get a brain list please
3 0
3 years ago
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