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3.  B because electronegativity allows h20 to have higher boiling point
22. B isotopes are made from same element, however each have different nuetrons
19. The foward and reverse reactions would increase.
2. B because if two chemicals have same volume, then both samples would have same amount of atoms.
6. A because you use +1 charge from 11 protons then you will have 10 electrons
15. C because the atoms x2 and z2 are arranged next each other seperatly , so when collided both types of atoms will be next to each other
8. B because the melting point for Al is 933K so it will turn into a liquid before 1000k
17. Freezing point are the same for both mixtures
1. B because when thermal energy flows from iron to copper, copper becomes warmer then iron.
20. C according to rutherford the, electrons are negative and are scattered outside of nucleus.
12. A because the electronegitivity for HF is 4.9, is polar but the least.
23.

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23. B because in the other answers it doesnt list the right forms of energy thermal, chemical, and electromagnetic and all forms of energy.

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1b
1-(a)
2-(b)
9-(c)
10-(a)
11-(c)
13-(c)
14-(b)
17-(d)
18-(d)
19-(d)
21-(a)
22-(c)
23-(b)

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#1: A, because heat moves from hot to cold
#8: C, because Ca has a melting point of 1115
#10: D, it’s synthesis because they are combining into 2H20
#20: C, electrons have negative charge, protons and neutrons are in the nucleus
#7: C, because the 1 was moved
#2: B, because they are the same measurement
#5: C, his principal is in stress
#18: increasing the surface area allows for more collisions which make reactions
#19: When equilibrium is reached in a system the reaction is constant
#23: B, because the 4th shell is the valence shell which holds the elections farthest from the nucleus

#15: B, because the other options don’t make sense if they collide
#16: D, it is Zn because Zn has a higher activation rate
#11: B, because if it gains two elections it gains 2- energy which evens it out

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Day 1 1a
#20
Answer C because the reaction shows a single replacement rather than synthesis and decomposition. Some of the chemicals are switched  around once.
#10
Answer A because ideal gas particles only move in straight lines and has no attractive force.
#12
Answer is C because chemical reactions only happen when the energy collides and there is proper orientation.
#22
Answer is C because the total number of neutrons is found by the subtraction of electrons from protons.

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20. The answer is B because CO2 is a asymmetrical molecule
14. The answer is C because the elements are arranged in order of increasing atomic number
17. The answer is A because ammonia is a compound and it can be broken down by chemical means
19. The answer is B because they are distinguished by by the manner in which the atoms bind to one another in the compound. The 2 types are Ionic and molecular
9.  Ne-20 has 20 and Ne-22 has 22 this is because it shows it in the isotope notation
11. The answer is B because the nucleus contains protons and it has a positive charge so that part of the atom has a overall positive charge
24.  The answer is C because out of all the choices oxygen’s electronegativity is the highest so it’s attraction for electrons in a chemical bond is higher
5. The answer is B because it is going from a gas to a solid and that phase change increases in entropy
16. The answer is D because allotropes have different molecular structures and different properties
6. The answer is Xe because the amount of electrons is the same which is 54
12. The answer is B because protons and neutrons have masses close to 1 u
13. The answer is C because the gold foil experiment had a result of the discovery of the electron
25. The answer is D because for a gas to be ideal the temperature has the be high and the pressure has to be low. D shows that the temperature is 600K and 50.kPa this choice has the highest temperature and the lowest pressure out of all the choices.

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8. A

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18.
15.
20. the answer is C because an electron only has a negative charge and it's outside of the nucleus.
10. the answer is D because synthesis means that they are combined which is the exact process 2H2+O2-->2H2O
12. the answer is A because HI is the least polar since you're supposed to subtract the elect
ronegativity of H and I and that would be your lowest on out of the four choice
16.
4.
24.
8.
7.
17.
22.
23.

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1.Answer is B because after calculation,220 divided by 44 is 5
3.Answer is C because when pressure decrease volume increase and C is the most logical one for a little decrease in pressure which means a little increase in volume.
4.Answer is A because it matches the equation when every given is plugged in.
5.Answer is C because it is the only answer changing from having some sort of form to no form.
11.Answer is B because only protons in an atom have positive charge.
12.Answer is B because only protons and neutrons have mass in an atom.
14.Answer is C because the reference table is arranged by increasing atomic number.
15.Answer is A because it is the only metalloid throughout the choices.
16.Answer is D because O2 and O3 are allotropes,allotropes always have different molecular structures and properties.
17.Answer is A because it's the only compound.
20.Answer is D because only NH3 is  a polar molecule and polar molecules are asymmetrical.]
21.Answer is D because it is the only one that is logical.
23.Answer is B because only B lists 3 forms of energy.

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14. Answer: 6.15L
(1atm)(11.2)/(273k)=(2atm)(V2)/(300k)

24. A

25. D
Look at your reference table on the table of elements

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21.

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Silas Rodriguez
1a
3:d because i is at the bottom of the table
6:a I just feel like it’s right
10:a ideal gases has low pressure, random motion, and no attraction
20:d I feel it’s right
23:d 2-8-1 becomes 2-7-2

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23. D because you are releasing more energy to go from 8 electrons in third shell back to 2 electrons in last shell.
10. D because you are combining both chemical equations using energy

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18) The answer is D because gas samples 2 and 4 have similar temperature, pressure and volume
15) The answer is D because when electrons release energy, they are no longer excited and go back a shell
20) The answer is C because the chlorine in the reaction breaks away from the hydrogen and joins the magnesium
10) The answer is A
12) The answer is C
22) The answer is C because when you subtract the number of protons of the element from the ion number, in this case, it's 42-19 which is 23
7) The answer is C
8) The answer A
16) The answer is A
23) The answer is D because electrons move to another shell when in an excited state
17) The answer is D
24) The answer is C
4) The answer is D because carbon monoxide has one carbon and one oxygen atoms, but carbon dioxide has the same amount of carbon, but two oxygen atoms

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Daniel Rojas 1d

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Daniel Rojas 1d

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Joshua (b)

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18.
15. the answer is B because each molecule of X2 will collide with each molecule of Z2
20. the answer is C because an electron only has a negative charge and it's outside of the nucleus.
10. the answer is D because synthesis means that they are combined which is the exact process 2H2+O2-->2H2O
12. the answer is A because HI is the least polar since you're supposed to subtract the electronegativity of H and I and that would be your lowest on out of the four choice
16.
4.
24.
8.
7.
17.
22.
23.

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10) the answer is A since random straight line motion and no attractive forces describes the motion and attractive forces of an ideal gas particle.
20) the answer is c since the equation shows an reaction of single replacement.
17) the answer is b since  it reacts with hydrogen and becomes polar.
3) the answer is  d since iodine haves the highest atomic radius ( it increases top to bottom )
14) answer is c) because elements x and a present in element mixture
2) the answer is b since graphite and diamond are allotropes meaning they both have different crystal structures.
19) the answer is a since in table a it shows that NO2 (g)  is +66.4 half is +33.2.
22) the answer is c because when you  subtract 42 with the potassium protons you get 23.
1)  the answer is c since melting is a chemical propety.
13) answer is b since system in nature tend to undergo in changes with low energy and high energy.

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10) THE ANSWER IS D BECAUSE ACCORDING TO THE WAVE MECHANICAL MODEL AN ORBITAL IS DEFINED AS THE PROBABLE LOCATION OF ELECTRONS
25) THE ASNWER IS A BECAUSE IF YOU WANT TO GET AN IDEAL GAS  THE TEMPERATURE SHOULD BE LOW AND THE PRESsURE SHOULD BE HIGH.
5) THE ANSWER IS C SINCE AN ENTROPY SHOULD DECREASE OR MOVE OR CHANGE IT TO A LOW PHASE SUCH AS SOLID GOES TO GAS.
12)
the answer is b because the mass of protons a neutrons are aprox 1 u.
14) the elements of the periodic table are arranged by c) the atomic numbers.
4) the answer is  A because e the term " completely melting" haves to do with heat of fusion.
7) the radius of cesium ion in cesium chloride is smaller than the  radius of cesium when both are in ground state because when the atomic radius trend goes to the left and to the right is decreases meaning that the both elements were decreasing instead the other element increased because it was on top or bottom.
16) both elements have different molecular structures and different properties meaning they're allotropes.  answer (d)
19) answer is b since ionic and molecular represent major categories of compounds.
15) the element that is classified as a metalloid is answer a : Te its classified as a metalloid because in the periodic table Te is in the zip line which is metalloids.
13) the discover of the electron as a subatomic particle was a result of the gold foil experiment. (c)
21)  answer is c since its exothermic AS energy is absorbed  when bonds are broken and energy are released when bonds are formed.