# Posts by Shyanne

Total # Posts: 24

American Government
1 . acd 2. a 3. b

probability
You guess on all of the answers on a 10 question quiz. If there are 4 possible answers for each question, what is the probability that you get 3 questions right? i've tried doing this problem multiple times and i'm just not understanding.. step by step would be very ...

math
I don't get this I've been absent for 3 weeks On a math quiz Mary score 3 points for each of the 12 multiple-choice question she answered correctly and five points for each of the eight free response question she answered correctly. What was the total number of points ...

math
The least amount of money he could have is 120 dollars

Physical sciences(Chemistry)
Ethanoic holds in heat making it colder so it takes a higher temp. to make it boil but ethanol releases heat making it warmer and a lower boiling temperature this is also why ethanol is flammable but ethanoic is not

math
The boundary line is the line on our graph where x or y equals infinity.

Chem
Electroplating is a widely used process. One of the most popular electroplating processes involves the plating of two metals, nickel and chromium, in separate vats. Nickel is plated first because it adheres better to iron, then the object is moved to a second vat where a layer...

chemistry
Cathode = Cu2(s) + 2e- ¨ Cu(s) Anode = 2H2O(l) ¨ O2(g) + 4H(g) + 4e- Net = Cu2(s) + 2H2O(l) ¨ Cu(s) + O2(g) + 4H(g) the minimum voltage that must be supplied to electrolyze aqueous copper(II) sulfate

Chemistry
Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please help!!

electrochem
Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please and thank you. im so stuck. :/

Electrochemistry
Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please and thank you. im so stuck. :/

Electrochemistry
Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please and thank you. im so stuck. :/

chem
calculate the volume of water that can be treated if 50 g of potassium permanganate is added to the system. Assume that the concentrated iron (II) ions in well water is 5.0ppm

chemistry
molar enthalpy of combustion for pentane? Mass C5H12= 2.15g Mass H2O= 1.24kg Initial temp= 18.4°C Final temp= 37.6°C

chemistry
im doing ethene so it is -84.0. Howe do i spilt the two up? the second question confuses me and im completely frazled about what to do. C2H6(g) + 3O2(g) = 2CO2(g) + 2H2O(g) =(2mol CO2 x -393.5kJ/1 mol CO2 + 2mol H2O x -241.8kJ/ 1 mol H2O) - (1mol C2H6 x -84.0/ 1 mol C2H6 + ...

chemistry
how do i express the enthalpy of reaction calculated in question above as a molar enthalpy of reaction per mole of carbon dioxide?

chemistry
ok i got to (2mol CO2 x -393.5kJ/i mol CO2 + 2mol H2O x -241.8kJ/ 1 mol H2O) - (1mol C2H6 x -94.0/ 1 mol C2H6 + 3mol O2 x 0kJ/ 1 mol O2) = (-1270.6kJ0 - (-84.0) = -1186.6kJ is this right? and how do i do the second part about expressing the enthalpy of reaction calculated in ...

chemistry
Calculate the enthalpy of reaction for the combustion of ethene. Express the enthalpy of reaction calculated in question above as a molar enthalpy of reaction per mole of carbon dioxide.

Math
Use the following information to determine the number of people in each region of the Venn Diagram 174 people were asked which of these instruments that they could play: Piano, Drums, or Guitar. 33 people could play none of these instruments. 9 people could play all three of ...

Physics
A crate with a total mass of 50 kg is initially at rest on a level floor.What is the weight of the crate?

science
how do you prevent an egg from breaking from a height of 10-15 ft.?

history project
how to i get started on a middle ages shield?

Education
Does the Individuals Disabilities Education Act (IDEA) and the Education for the Handicapped Act Ammendments of 1986, focus on services provided to families, children, communities, or to schools? I am thinking they provide services to families. Don't they? Education of the...

Math - please check
1.Find the median of these numbers: 3, 8, 4, 16, 10, 12 Wouldn't the median be 9? 2. Find the mode of these numbers: 1, 2, 1, 5, 3 Wouldn't the mode be 1? The median would have equal numbers of entries above and below. 9 is correct The mode is the number that occurs ...

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