Wednesday
April 23, 2014

Posts by rebekah


Total # Posts: 449

Math
Find the missing number. 5/15 = ?/3 Is 1 the correct answer?

English
Can you guys proof read part of an essay im writing. I know you do not know the context but, im just talking about the grammar issue. here it is: Along with the tension that goes on between Mr. And Mrs. Bennet, Charlotte and Mr. Collin’s marriage is not all happy giddy. C...

physics
A lamp hangs vertically from a cord in a descending elevator that decelerates at 2.6 m/s2. (a) If the tension in the cord is 54 N, what is the lamp's mass? (b) What is the cord's tension when the elevator ascends with an upward acceleration of 2.6 m/s2?

french
I am doing a debate in french and my side is that the HLM in France isnt working and it should be replaced with a new type of system. Do you know any websites with information about the HLM in france. All I can find in wikipedia. also any charts or graphs showing like the cri...

French
I am doing a debate in french and my side is that the HLM in France isnt working and it should be replaced with a new type of system. Do you know any websites with information about the HLM in france. All I can find in wikipedia. also any charts or graphs showing like the crim...

physics
A car moving with constant acceleration covered the distance between two points 60.0 m apart in 6.00 s. Its speed as it passed the second point was 15.0 m/s. (a) What was the speed at the first point? (b) What was the magnitude of the acceleration? (c) At what prior distance f...

geometry
A triangle has a ratio of 3:8:9 what is the measure of the smallest angle

random question
*in them

random question
what words have the word or sound of 'mole' in the. this is for a science project i am doing. we are given out lines of the animal a mole and we have to make a mole but have like a theme to it kinda. like someone did a camel(camole) thanks

Chem
That makes sense! Thanks:)

Chem
Use the following reactions to arrange the elements A, B, C, and D in order of their redox activity, from greatest to least. 2 A + B2+ --> 2 A+ + B B + D2+--> B2+ + D A+ + C -->No reaction 2 C + B2+ --> 2 C+ + B Can someone explain? thanks

Chem
balance the half-reaction. (Type your answer using the format CO2 for CO2, [NH4]+ for NH4+, and [Mg]2+ for Mg2+. Use the lowest possible coefficients.) I am sooo confussed (a) S(s) --> H2S(g) thanks

Chem
Assign an oxidation state to each atom in each of the following compounds. Fe(CN)3 Fe: 3+ (i know this is correct) C N im not sure about the other two

chem
true or false?? a)If there are no changes in the oxidation state of the reactants or products of a particular reaction, that reaction is a redox reaction. false? b)A reducing agent gets oxidized as it reacts. true?

Quotes about English language origin
ooooooooo I am liking these quotes. Thankyou Ms. Sue and Writeacher!

Quotes about English language origin
So I wanted to start my etymology paper about fascinating word origins with a quote as my attention grabber. I am looking for a quote that talks about the english language and the origin of most of its words. Some interesting quote. I don't even know if there is a type of ...

Etymology
Thanks soooo much:)!

Etymology
So I posted like 3-4 weeks ago that I was doing a project about fascinating etymology stories and I got a few great websites:) I only could find a few really funny and interesting stories that my classmates would actually enjoy/ want to listen to. I have been to fun-with-words...

chemistry
If 0.075 g of MgF2 dissolves per liter of solution, calculate the solubility-product constant. I got 2.0e-9 but it was not correct.

Chem
(c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in grams per liter of solution. Appendix D: Ksp for Cu(OH)2 = 4.8 x 10-20 thanks!

Chem
I got A I just need b and c:)

Chem
oops... (c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in grams per liter of solution. Appendix D: Ksp for Cu(OH)2 = 4.8 x 10-20

Chem
(a) The molar solubility of Ag2CrO4(s) at 35°C is 1.3 10-4 mol/L. Calculate Ksp. (b) If 0.0490 g of AgIO3 dissolves per liter of solution, calculate the solubility-product constant. (c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in...

Chemistry
is it 6.429x10^-9?

Chemistry
A 1.00 L solution saturated at 25°C with lead(II) iodide contains 0.54 g of PbI2. Calculate the solubility-product constant for this salt at 25°C. thanks

1950's Food
For english im in a group that is doing a presentation on 1950 food. Were going to be making rice crispy treats and bringing them in since that was a popular dessert during the time. but we want to make it.. for lack of a better word, interesting. so does anyone know of someth...

Amer lit
Is there any website online where I can read the full book "Betty Crocker Picture Cook Book"? thanks

chemistry
So no effect?

chemistry
I got it I just need help on this one... The gas phase reaction between nitrogen gas and oxygen gas to give NO gas is an endothermic process since 180.8 kJ of heat energy is absorbed when 1 mol of nitrogen reacts with 1 mol of oxygen. In which direction will the equilibrium be...

chemistry
The gas phase reaction between nitrogen gas and oxygen gas to give NO gas is an endothermic process since 180.8 kJ of heat energy is absorbed when 1 mol of nitrogen reacts with 1 mol of oxygen. In which direction will the equilibrium be shifted if the temperature is increased?...

Chem
Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) --> Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur? (a) HCl is added. increases decreases .(b) Co(NO3)2 is added. increases decreases .(...

Check my answers? (Chemistry)
Now I just need 3 and 4 checked

Check my answers? (Chemistry)
I only get one chance for each of these questions so I was wondering if someone could check my answers, thanks! 1. Consider the following reaction at equilibrium. 2 BrNO(g) ---> 2 NO(g) + Br2(g) Predict the effect of the following changes to the reaction mixture. (a) adding...

American kitchen technology in the 1950s
Do you know of any websites that talk about new cooking technology inventions that were created/ starting to be used in the 1950s? Thanks:)

chemistry
I posted a question similar to this one a few days ago and someone helped me with it. but now im on a similar one and i did the same thing to find the answer but it was wrong. what am i doing wrong? An equilibrium mixture of the following reaction was found to have [CH4] = 0.0...

chem
Thanks:)

chem
An equilibrium mixture of the following reaction was found to have [COF2] = 0.255 M and [CF4] = 0.118 M at 1000°C. What is the concentration of CO2? 2 COF2(g) CO2(g) + CF4(g) Keq = 2.00 at 1000°C Thanks:)

chem
Consider the following reaction. 2 NO(g) + 2 H2(g) N2(g) + 2 H2O(g) An equilibrium mixture of this reaction at a certain temperature was found to have [NO] = 8.1 10-3 M, [H2] = 4.1 10-5 M, [N2] = 5.3 10-2 M, and [H2O] = 2.9 10-3 M. What is the value of the equilibrium constant...

chem
how can you tell if two reactants will make a buffer?

chem
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? (Select all that apply.) NaCN and HCN NaCN and NaOH HCN and NaOH HCl and NaCN HCl and NaOH and Which of the following gives a buffer solution when equal...

chem
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? (Select all that apply.) NaCN and HCN NaCN and NaOH HCN and NaOH HCl and NaCN HCl and NaOH I thought it was the middle three because each either has a s...

chem
Give the conjugate base of the following Bronsted-Lowry acids. (Type your answer using the format CO2 for CO2, [H2AsO4]- for H2AsO4-, and [Ni(CN)4]2- for Ni(CN)42-.) 1) H2SO4 I have tried H[SO4]- and just HSO4 but they are both wrong:(

Chemistry
calculate the freezing and boiling points of each of the following solutions. (a) 0.37 m glucose in ethanol freezing point ______I got -1.2e2 but its wrong_______°C boiling point _________I got 1.1e2 but its wrong:(____°C (b) 15.0 g of decane, C10H22, in 37.9 g CHCl3 f...

Chemistry (repost)
I keep getting the same thing for b. .17

Chemistry (repost)
Determine the volume of 0.240 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is shown below. H2SO4(aq) + 2 KOH(aq)---> K2SO4(aq) + 2 H2O(l) a) 26 mL of 0.240 M H2SO4 b) 143 mL of 0.14 M H2SO4 for a I got .01...

chem
Thanks!

chem
What is the molarity of ZnCl2(aq) that forms when 15.4 g of zinc completely reacts with CuCl2(aq) according to the following reaction? (Assume a final volume of 175 mL.) Zn(s) + CuCl2(aq) --> ZnCl2(aq) + Cu(s) I got the moles of Zn but dont know what to do with it thanks

Chemistry
Im confused, where did you get NaOH?

Chemistry
Determine the volume of 0.240 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is shown below. H2SO4(aq) + 2 KOH(aq)---> K2SO4(aq) + 2 H2O(l) a) 26 mL of 0.240 M H2SO4 b) 143 mL of 0.14 M H2SO4 for a I got .01...

chem
thanks:)

chem
so would it be 2.86?

chem
...A dioxin-contaminated water source contains 0.044% dioxin by mass. How much dioxin is present in 6.5 L of this water? (Assume that the density of the solution is 1.00 g/mL.) thanks

chemistry
Picking any two compounds, how do you describe which one has a higher dispersion force using the words Larger electron cloud and polarizability? Thanks:)

chem
Indicate the type of crystal (molecular, metallic, covalent-network, or ionic) each of the following would form upon solidification. 1. B

chem help urgent!
nvm i got it wrong:(

chem help urgent!
i only have one submission for these and i dont' really know how to tell which one has the higher boiling point. can you help? Of each pair of solids, which one has the higher melting point? Kr(s) or Cu(s) and.. CCl4(s) or SiCl4(s)

Chemistry
Of each pair of solids, which one has the higher melting point? a) HCl and KCl b) Cu and Kr. Can you please explain? How do you know the melting point? Is it the type of intermolecular force that they have? thanks!

science
actualy Kr and Cu. thanks:)

science
Of HOOH(s) and TiO2(s) which one has the higher melting point?

chem
Which of the following compounds would be expected to form intermolecular hydrogen bonds in the liquid state? (Select all that apply.) HCO2H CH3OCH3 (dimethyl ether) CH3CO2H (acetic acid) CH3OH (methanol) thanks:)

chemistry
What intermolecular force(s) must be overcome to do the following. (a) sublime ice hydrogen bonding dipole-dipole interactions (not hydrogen bonding) induced-dipole/induced-dipole forces ion-dipole force You can choose one. Can some one please explain. I know the intermolectul...

chem
What type(s) of intermolecular force is (are) common to each of the following. (Select all that apply.) 1) Xe and methanol (CH3OH) a)london-dispersion forces b)dipole-dipole c)hydrogen bonding i put a and b but it was wrong 2)CH3OH and acetonitrile (CH3CN) a)london-dispersion ...

chem
Name the phase transition in each of the following situations and indicate whether it is exothermic or endothermic. (a) Frost appears on a window on a cold winter day. Is frost considered a liquid? I am really confused thanks:)

chem- drbob222 please help
my original question was: how do i figure this out?? How much heat does your body lose when 2.46 g of sweat evaporates from your skin at 25°C? chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm q = mass water x delta Hvaporization. chem - Rebekah, Wednesday, February ...

chem
so 44.0 kj/1mol X 2.46g? i tried that and got it wrong. am i suppose to convert g to kj?

chem
how do i figure this out?? How much heat does your body lose when 2.46 g of sweat evaporates from your skin at 25°C?

Health
Also I have been looking around but not really sure. Can hypochondria be inherited?

Health
So for my health class I have to make a 4 slide powerpoint and on one of the slides I have to have the Name of the Mental illness and Definition/Classification. I have the name (Hypochondria) and the definition. Is the classification the same thing or something different. than...

chem
is SiS2 polar or nonpolar? Why? I think its non but when I searched it people were saying polar thanks:)

Any suggestions for easy french dessert?
Thanks!

Any suggestions for easy french dessert?
ok so for my school we have this thing called OCMC (One Community Many Cultures) and I have to make a poster and then for extra credit I can make a french food. I wanted to make a french dessert (Something that doesnt have to be hot or cold and can sit in room temp for 2 hours...

chemistry
Write electron configurations for the following ions, and determine which have noble-gas configurations. (Type your answer using the format [Ar] 4s2 3d10 4p2 for [Ar]4s23d104p2.) Ru2+ thanks

Chemistry
A student mixes 100.0 mL of 0.300 mol/L silver nitrate solution with 100.0 mL of 0.300 mol/L calcium chloride solution. a) Determine the theoretical yield of the precipitate. b) If the actual mass of precipitate is 4.00g, calculate the percent error of this experiment.

Chemistry
this is what i have so far: 2AgNO3 + CaCl2 ---> 2AgCl + Ca(NO3)2 for AgNO3: V= 0.100L c=0.0300 mol/L n=cV = 0.03 mol for CaCl2: V= 0.100L c=0.0300 mol/L n=cV = 0.03 mol and now I don't know how to determine the limiting reactant.

Chemistry
A student mixes 100.0 mL of 0.300 mol/L silver nitrate solution with 100.0 mL of 0.300 mol/L calcium chloride solution. a) Determine the theoretical yield of the precipitate. b) If the actual mass of precipitate is 4.00g, calculate the percent error of this experiment.

chem
What is the frequency of radiation whose wavelength is 19.80 ? thanks:)

chem
Calculate the number of grams of magnesium nitride necessary to produce 2.02 L of ammonia gas at STP. I got 4.55g for the upper question which is correct but idk how to do the bottom one: How many moles of magnesium hydroxide can also be formed? Mg3N2(s) + 6 H2O(l)--> 3 Mg(...

chemistry
classify in as many ways possible 2 Rb(s) + Br2(g) --> 2 RbBr(s) acid-base double-displacement gas evolution oxidation-reduction precipitation single-displacement synthesis thanks

chemistry
what is the cation and anion of Na3PO4? thanks

chem
for the 3CH4. why is it $ and does C have to go before H??

chem
I still dont get it, can u explain???

chem
Complete and balance each of the following equations. If no reaction occurs, please enter NR in each answer box. (Type your answer using the format CO2 for CO2. Do not leave any box blank. Use the lowest possible coefficients.) ____Al4C3(s) + ___H2O ___Al(OH)3 + ___ _____ wher...

chemistry
so they dont have to have equal charge?

chemistry
what is the cation and anion of Na3PO4? thanks

7th grade Math
Find the next three numbers in this sequence and explain the reasoning; 2/3, 2/5, 6/25, 18/125,...

french
oops sorry i didn't see abby had already posted ^^

french
im pretty sure since monica is a girl it should be intelligente. but other than that i think it is good.

chem
Give the general formula for any dialkene; that is, a straight-chain hydrocarbon with two double bonds along the chain. (Type your answer using the format CnHn+1 for CnHn+1.)

chem-repost
but. i can tell its wrong because of what i stated: "i tried the answer in my online hw and it said it was wrong. i am looking in my text book and CnH2n-2. the answer you guys are saying is the formula for alkynes. but i need to find the formula for dialkene. the formula ...

chem-repost
I ddin't know if anybody would look far down to page to help me answer my question but this is what was said so far. Posted by rebekah on Sunday, October 24, 2010 at 4:48pm. Give the general formula for any dialkene; that is, a straight-chain hydrocarbon with two double bo...

Science
If you heat an iron bar until it glows red hot. the chemical composition is still the same but the silver iron bar changed to a red color hope that helps:)

chem
i tried the answer in my online hw and it said it was wrong. i am looking in my text book and CnH2n-2. the answer you guys are saying is the formula for alkynes. but i need to find the formula for dialkene. the formula for just alkene is CnH2n. but i dont know how to make that...

chem
oh. that wasn't the correct answer

chem
Give the general formula for any dialkene; that is, a straight-chain hydrocarbon with two double bonds along the chain. (Type your answer using the format CnHn+1 for CnHn+1.) I know just alkene would be CnH2n but im not sure how to make it with the dialkene. can any1 help me? ...

chem
oh oops the lines on the picture moved all to the right. idk how to get them to stay.... but the top row should be above the 4th set of CH's from the left and the bottom set should be below the second from the right

chem
What are the IUPAC names of the following alkane. CH3CHCH3 I CH3CH2CH2CHCH2CHCH3 I CH3 i thought it was 2-methyl-4-propylheptane but aparently that is wrong. does anyone know the answer?

math
Given: segment AC and segment BD bisect each other at E prove: E is the midpoint of segment RS i don't know if you will be able to visualize the picture but just incase someone is i really need help on the proof for this one. Picture: two(supposedly congruent)triangles tha...

French III
I think I got it but why do you say I got my hair cut. Je me suis fait couper Les cheveux? Why do you use me suis?

French III
Can someone please explain to me the difference between the futur and the futur causitive(sp?)

Chem
Oops I just need c

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