Tuesday
December 6, 2016

# Posts by rebekah

Total # Posts: 478

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...
February 2, 2011

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
January 20, 2011

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.
January 8, 2011

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.
January 8, 2011

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.
January 8, 2011

chem
What is the frequency of radiation whose wavelength is 19.80 ? thanks:)
January 6, 2011

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(...
December 9, 2010

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
November 29, 2010

chemistry
what is the cation and anion of Na3PO4? thanks
November 28, 2010

chem
for the 3CH4. why is it \$ and does C have to go before H??
November 28, 2010

chem
I still don't get it, can u explain???
November 28, 2010

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 + ___ _____ ...
November 28, 2010

chemistry
so they don't have to have equal charge?
November 23, 2010

chemistry
what is the cation and anion of Na3PO4? thanks
November 23, 2010

Find the next three numbers in this sequence and explain the reasoning; 2/3, 2/5, 6/25, 18/125,...
November 16, 2010

french
November 9, 2010

french
im pretty sure since monica is a girl it should be intelligente. but other than that i think it is good.
November 9, 2010

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.)
October 25, 2010

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 ...
October 24, 2010

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 ...
October 24, 2010

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:)
October 24, 2010

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 don't know how to make...
October 24, 2010

chem
oh. that wasn't the correct answer
October 24, 2010

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? ...
October 24, 2010

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
October 24, 2010

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?
October 24, 2010

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 ...
October 23, 2010

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?
September 27, 2010

French III
Can someone please explain to me the difference between the futur and the futur causitive(sp?)
September 27, 2010

Chem
Oops I just need c
September 26, 2010

Chem
(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109? % (c) If the mass of Ag-107 is 106.905, what is the mass of Ag-109? amu I really need help. Can u say the answer then explain how you got it? Thanks:)
September 26, 2010

Chem
Oh yah ok thanks:)
September 26, 2010

Chem
(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109? Thanks
September 26, 2010

Chem
so how would u do it when an element gains. like Cl?
September 24, 2010

Chem
Yah I don't think we have gotten to the second part but the first makes sense. Thanks:)
September 24, 2010

Chem
thanks. can u explain that? and how did u know the stuff? like i am confused
September 24, 2010

Chem
Predict how many electrons will most likely be gained or lost by each of the following elements. Al I know it loses but how many?
September 24, 2010

chem
One could easily determine a single bb's mass by simply weighing it or by weighing 100 BBs and dividing the mass by 100. Why couldn't Robert Millikan use this procedure to measure the charge of an electron? Thanks:)
September 23, 2010

chemistry
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 12.0 fluid ounce drink from 75°F to 35°F, if the heat capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.) please explain realy realy well ...
September 15, 2010

chem.
i have another question: A 43 kg sample of water absorbs 343 kJ of heat. If the water was initially at 22.1°C, what is its final temperature? I got 1.9 but i think i didn't do it correctly
September 15, 2010

chem.
thanks!
September 15, 2010

chem.
Calculate the amount of heat required to raise the temperature of a 25 g sample of water from 5°C to 10.°C. i got 523 then rounded it to two sig figs 520 but it said it was wrong
September 15, 2010

chemistry
I got it wrong. can u explain it better. i don't think that is in the correct equation form??
September 15, 2010

chemistry
oops. forget what I said last
September 15, 2010

chemistry
how do i know what that mass of the ice is?
September 15, 2010

chemistry
thanks. um. i got 201. but it said it was wrong
September 15, 2010

chemistry
oops here. When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 12.0 fluid ounce drink from 75°F to 35°F, if the heat capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.)
September 15, 2010

chemistry
capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.)
September 15, 2010

chemistry
I got it:)
September 15, 2010

chemistry
If 1.68 L of water is initially at 25.0 °C, what will its temperature be after absorption of 6.8 10-2 kWh of heat? I don't know how to set it up because i have the equation q= m times c times change in temp (the triangle and the a T is the symbol for that. I know ther ...
September 15, 2010

chemistry
I got it:) it was 5e2
September 15, 2010

chemistry
I got it wrong! would it be 5e3. cause i messed up on the amount of spaces but idk if that is the correct sig fig?
September 15, 2010

chemistry
Calculate the amount of heat required to raise the temperature of a 16 g sample of water from 5°C to 12°C. Round to the correct number of sig figs. I got 5e3 and it was wrong.
September 15, 2010

Algebra
just to conferm is this the question 4x^2 - 5x ?
September 12, 2010

1) What happens when john turns to elizabeth for advice in act 4. Also... I cant find the physical appearance for Francis Nurse. Does anyone know how he is portrayed and looks like in the play
September 12, 2010

Chemistry
.Question part Points Submissions 1 0/0.5 2/3 Total 0/0.5 ...In the explosion of a hydrogen-filled balloon, 0.75 g of hydrogen reacted with 6.9 g of oxygen to form how many grams of water vapor? (Water vapor is the only product.) i already posted this but i don't think ...
September 11, 2010

Chemistry
349 kJ to joules
September 11, 2010

math
divide 49 by -7
September 11, 2010

math
divide -15 by 5. so -3
September 11, 2010

chemistry
i got 5.76e4 but its wrong
September 11, 2010

chemistry
241 kJ to Calories how do i do this?
September 11, 2010

Chemistry
In the explosion of a hydrogen-filled balloon, 0.75 g of hydrogen reacted with 6.9 g of oxygen to form how many grams of water vapor? (Water vapor is the only product.) I am really confused on how to do this.
September 11, 2010

Math
11+d=b b+3 +d=37 so.. plug in the top equation to the bottom and you get d+11 +d=37 so 2d=26 divide and you get d=13 plug this into the top equation and you get b=24 so answer: b=24 d=13 and you check by adding both and they equal 37
September 6, 2010

rly need help on math problem!
Directions: Use each statement as givena and draw a single conclusion using all of the statements. 1) No birds,except ostriches, are nine feet high.There are no birds in this aviary that belong to anyone but me. No ostrich lives on mince pie. I have no birds less than nine ...
September 6, 2010

begining algebra
(y/4) +y simplified: 5/4y
September 6, 2010

maths
2=1/n multiply by n 2n=1 divide by 2 n=1/2
September 5, 2010

math-logic
oops for 1) i got eggshells => not unselfish
September 5, 2010

math-logic
use each statement as given, and draw a single conclusion using all of the statements. => means implies 1) no misers are unselfish.None but misers save eggshells. Answer i got: eggshells => unselfish 2) Every eagle can fly.Some pigs cannot fly Answer 1 got:Every eagle =&...
September 5, 2010

maths
plug in the numbers so 20=4r then divide by 4 20/4 so 5=r
September 5, 2010

quick chemistry
A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. What is solid B most likely to be? a)...
September 4, 2010

conversion problems
convert 3.1 L to quarts
August 26, 2010

chemistry
ok,thanks.. so i got a)810 b)50. c)6.7 is that correct?
August 26, 2010

chemistry
Fill in the blanks. (a) 5.6 ft2 = ____ in2 (b) 5.6 yd2 = _____ ft2 (c) 5.6 m2 = ____ yd2 can you please explain how to do it
August 26, 2010

algebra 1
A0 h=12s b)just plug in those numbers for s:)
August 26, 2010

digital photagraphy
im not 100% but wouldn't it be Emphasis and Proportion
August 26, 2010

Chemisty (Sig Figs)
What do you mean?
August 25, 2010

Chemisty (Sig Figs)
1.20 Mm to kilometers its 1200 but when I put it in it said not the correct number of sig figs
August 25, 2010

english
I don't really understand your question? are you talking about 1st,2nd and 3rd person?
August 22, 2010

sig figs
how do you round 0.009934 to two sig figs? would it be .010? or would that be 3 sig figs?
August 22, 2010

Math
oh ok. you have to put that into slope intercept form. So it would be 8y=2 (because when we subtract the 3x with the 3x it cancels out) then divide the 8 so y= 1/4 im pretty sure that's how it would reduce down to now you just have to pull your info from that
August 22, 2010

Math
0=6x + 8 +8y is that what the question is? it should most likely be in this format y=mx+b
August 22, 2010

poetry
I think it is beautiful
August 22, 2010

science
i think it would be chemical weathering
August 22, 2010

Chemistry-sig figs
ernest y did u post that on my question? it doesn't ever pertain to my question
August 22, 2010

Chemistry-sig figs
oh so is it incorrect and the answer is 1.2 or is it 1.20? does the second answer have 3 sig figs?
August 22, 2010

Chemistry-sig figs
where did you get 0.049?
August 22, 2010

Chemistry-sig figs
Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them (a) 1.249 X 10 to the 3rd power. They said it rounded to 1.3 X 10 ...
August 22, 2010

Chemisty (Sig Figs)
so i am terrible at this. Round each number to 3 significant numbers. Can you explain? 1. 9845.42800 2. 1.548937675e12 3. 10.7771777425 4. 0.000045875 thanks:)
August 20, 2010

French
Thanks:)
August 18, 2010

French
what does this mean? "Quelle est ta matiere scolaire preferee? thanks:)
August 18, 2010

French
I got it!
August 18, 2010

French
How do you say "I prefere track" interms of the sport and not the actual track. I know how to say I prefer and I know that track has the word l'athletisme(sp?) but I'm not sure what come before. Is it faire or jour and is it du after that? Thanks:)
August 18, 2010

History
Do you think modernization was a positive or negative movement in the Ottoman Empire? Why?
July 13, 2010

Biology
How have guppies adapted over time to their freshwater environment? thanks:)
May 20, 2010

Biology
What kinds of cells make it difficult to tear fern leaves from a plant? thanks:)
April 28, 2010

algebra
9=-3/8r
April 15, 2010

Biology
I know that miller syndrome is autosomal recessive so would i use a karyotype or pedegree to represent that because I have to: Include a pedegree of at least 3 generations to demonstrate the inheritance pattern. Be sure to label and explain the chart accurately so that someone...
April 5, 2010

Biology
ok thanks
April 5, 2010

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