Does anyone have the answers for Chemistry B Semester Exam? =)
1. Cs-Br
2. Fr–Cl = 2.46
3.Hotter molecules have more kinetic energy.
4.The reaction is exothermic.
5. More bond energy is absorbed on the reactants side than is released on the products side.
6. an exothermic reaction
7. Endothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.
8. Heat must be released by the products in order to convert from the reactants.
9. Cooling a purple solution will turn it pink.
10. Both are flexible, but one conducts electricity while the other insulates.
11. high pressure, high temperature water extraction
12. reducing environmental impact
13. 15
14. The number of atoms, type of elements, and mass of reactants and products are equal.
15. 64 grams
16. 1.503×1023
17. The relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same.
18. Fission is a process in which a large nucleus is split into smaller nuclei.
19. beta-minus decay
20. alpha decay
21. Greenhouse gases have more than two atoms, allowing them to vibrate and release radiation, warming the atmosphere.
22. cause: acid rain
consequence: destruction of crops
23. toxic bacteria in the water supply
24. It reaches hard to get to oil and gas deposits.
Does any body know the new chemistry B semester exam for connecxus
brion has all the right answers
brion is right :) 100%
Brion is 100%
brion.... THANK YOU they are still right!!
got 24/24 with brion
don’t know if these are what Ki wants but here u go
1. Fe2O3+3H2SO4
how many atoms of oxygen will be found in the product(s) of the reaction?
12
15**
3
4
answer: 15
sorry i wanna play roblox so here are the rest of the answers;
2. the number of atoms, types of elements, and mass of reactants and products are equal.
3. 64 grams
4. 1.503x10^23
5. polar sugar molecules dissolve in water, which is polar.
6. high temps mean more kinetic energy, which keeps sodium and chlorine ions from combining, which increases solubility.
7. it accepts protons and only partially dissociates in water.
8. ph3 is stronger acid than nh3
9. cooling a purple solution will turn it pink
10. both are flexible, but one conducts electricity while other insulates.
11. high pressure, high temp water extraction
12. reducing environmental impact
13. the scientist is investigating charles’s law, which shows that temp and vol are directly proportional.
14. the relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same
15. fission is a process in which a large nucleus is split into smaller nuclei
16. beta-minus decay
17. alpha decay
17/17
100% <333
I don't even have the questions!
Has anybody found the answers for this yet?
Did anyone get the answers?
Does anybody have them??
1) Example Bond Energies of Ionic Compounds
Li–F = 1036 kJ/mol
Li-Br = 807 kJ/mol
Na-F= 923 kJ/mol
Na-Br = 747 kJ/mol
Given the general trend with bond energies, which of the compounds would have the smallest bond energy?
(1 point)
A.Cs-Br
B. K-Br
C. Cs-F
D. K-F
2) Based on the differences in electronegativities, with which atom is francium (Fr) most likely to form an ionic bond?(1 point)
A. Fr–I = 1.96
B. Fr–Se = 1.76
C. Fr–Cl = 2.46
D. Fr–At = 1.50
3) Which statement is the best description of the energy found in molecules of water? (1 point)
A. A molecule's temperature is not connected to its energy.
B. Colder molecules have more thermal energy.
C. Colder molecules have more kinetic energy.
D. Hotter molecules have more kinetic energy.
4) When potassium permanganate and glycerol react, the potential energy of the products is less than the potential energy of the reactants. Which statement about this reaction is correct?(1 point)
A. The activation energy of the system is negative.
B. The reaction is endothermic
C. The reaction is exothermic.
D. The total potential energy of the system is constant.
4) Hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. Which statement must be true of the reaction?(1 point)
A. The bond energy used to break the bonds in hydrochloric acid and sodium hydroxide is less than the energy released to form the bonds in water and sodium chloride.
B. The total bond energy of water and sodium chloride is greater than the total bond energy of hydrochloric acid and sodium hydroxide.
C. More bond energy is absorbed on the reactants side than is released on the products side.
D. The energy of each bond in water and sodium chloride is greater than the energy of each bond in hydrochloric acid and sodium hydroxide.
The energy of each bond in water and sodium chloride is greater than the energy of each bond in hydrochloric acid and sodium hydroxide.
5) Imagine a graph. The x-axis is labeled "Time" and is measured in seconds, and the y-axis is labeled "Potential Energy" and is measured in kilojoules. The slope starts at 0 seconds with a plateau at 25 kJ. This plateau is labeled "Reactants." The slope then rises to a peak labeled "Activation Energy" at 78 kJ. Finally the slope drops to a plateau at 14 kJ and is labeled "Products."
A. an exothermic reaction
B. a phase change graph
C. rate of Reaction graph
D. an endothermic reaction