Friday

April 18, 2014

April 18, 2014

Total # Posts: 449

**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 dont 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 couldnt 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 tha...

**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 dont 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**

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 dont 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 is a ...

**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 ?

**Questions about the Crucible**

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 dont think people u...

**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 confussed 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

**beginningalgebra**

i posted on your previous post:)

**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 fee...

**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)com...

**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 dont 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 thats 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

**Biology**

What are some treat ments for Miller Syndrome? If you found a website that would be great. I already know of NINDS and FACES websites. thanks:)

**Biology**

ok thanks so much!

**Biology**

What are the treatments for Miller Syndrome. A website would be nice:) Thanks!

**Biology**

What are 3 ways that guppy fish interect (symbiosis,mutualism etc.) please provide a website:) thanks:)

**Science**

I got that... disregard this post

**Science**

I found out the answer! also where do guppies live in the world. A website would be great! thanks:)

**Science**

Do guppies live in a herd, grove, alone, pairs, or colonies? Of what size? I have been trying to find this answer but its so broad and i need a little help. If you could also post the website where you found the information the would be great! thanks:)

**Stem Cell Research**

Thanks so much!

**Stem Cell Research**

Thanks, do you know of any specific ones that just talk about opposing or just supporting?

**Stem Cell Research**

Hi I need to find 4 articles about stem cell research. 2 need to be ones that just support it and 2 the just oppose it. Does anyone have any link of web sites where I can find this. It can't talk about both it has to oppose or support. Also a website would be ok but if you...

**Wrld Hst**

What did Margaret Cavendish believe/ talk about in her book Philosophical Fancies? thanks:)

**Biology**

Do prokaryote cells and eukaryote calls both go through the M phase or does just eukaryote cells? Then what does prokaryote cells go through in the cell cycle? thanks:)

**Wrld Hst**

Why did the Spanish empire decline in the 1600's? thanks:)

**biology**

how do you draw tryptophan and i need to know what goes around the pentagon part etc. thanks

**Science**

So like what are some examples because I was confused and my teacher said it had something to do with Mutualism and Parasitism.

**Science**

What are interactions between living things in the tropical rainforest? thanks

**Social Studies**

Then did John come after that?

**Social Studies**

Then did John come after that?

**Social Studies**

Henry II of England

**Social Studies**

thanks, and also do you know who was king after henry because in my text book it communicates John but i looked on google and it says richard

**Social Studies**

How does the movie The Lion in Winter relate to World History? thanks

**Science**

What chemicals are in curds? thanks

**Science**

ok thanks so much!

**Science**

thanks, What do you put for the hexagon?

**Science**

how do you draw a the amino acid Phenylalanine? thanks:)

**algebra**

3x????

**Algebra**

NeverMind!!

**Algebra**

help please:)!!

**Algebra**

A grocer mixes together some cashews costing 8$ per kilogram with some nuts costing 10$ per kilogram. The grocer sold 12 kg of the mixture for 8.50$ per kilogram. How many kilograms of cashews were in the mixture? I have to find 2 equations then find the answer most likely usi...

Pages: <<Prev | 1 | 2 | 3 | **4** | 5 | Next>>