# 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...

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 don't 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 + ___ _____ ...

chemistry
so they don't have to have equal charge?

chemistry
what is the cation and anion of Na3PO4? thanks

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

french

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 ...

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 don't know how to make...

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 ...

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

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:)

Chem
Oh yah ok thanks:)

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

Chem
so how would u do it when an element gains. like Cl?

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

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

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?

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:)

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 ...

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

chem.
thanks!

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

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

chemistry
oops. forget what I said last

chemistry
how do i know what that mass of the ice is?

chemistry
thanks. um. i got 201. but it said it was wrong

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.)

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

chemistry
I got it:)

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 ...

chemistry
I got it:) it was 5e2

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?

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.

Algebra
just to conferm is this the question 4x^2 - 5x ?

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

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 ...

Chemistry
349 kJ to joules

math
divide 49 by -7

math
divide -15 by 5. so -3

chemistry
i got 5.76e4 but its wrong

chemistry
241 kJ to Calories how do i do this?

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.

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

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 ...

begining algebra
(y/4) +y simplified: 5/4y

maths
2=1/n multiply by n 2n=1 divide by 2 n=1/2

math-logic
oops for 1) i got eggshells => not unselfish

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 =&...

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

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)...

conversion problems
thanks

conversion problems
convert 3.1 L to quarts

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

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

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

digital photagraphy
im not 100% but wouldn't it be Emphasis and Proportion

Chemisty (Sig Figs)
What do you mean?

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

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

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

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

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

poetry
I think it is beautiful

science
i think it would be chemical weathering

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

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?

Chemistry-sig figs
where did you get 0.049?

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 ...

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:)

French
Thanks:)

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

French
I got it!

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:)

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

Biology
How have guppies adapted over time to their freshwater environment? thanks:)

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

algebra
9=-3/8r

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...

Biology
ok thanks

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