livleigh

A 6.34 g sample of an unknown metal M is burned in the presence of excess oxygen, producing the oxide M2O3 (s) and liberating 134 kJ of heat at constant pressure. What is the identity of the metal?

4 M (s) + 3 O2 (g) → 2 M2O3 (s)

They give a list of options but i know the right answer so if you could just tell how I would arrive at the correct one that would be amazing!

The correct answer is:

Sc2O3 with a molar mass of 44.96 g/mol and an enthalpy of formation Hf of -1908.8 kJ/mol

I have a feeling this is from an old AP test, so the scoring guideline may be floating around somewhere, but I cannot find it. If anyone does know where I could find this, simply a link would be great help. Otherwise just help explaining would be very appreciated.

A student weighs out equal amounts of magnesium hydroxide, calcium carbonate, calcium sulfate, and sodium bicarbonate but carelessly forgets to label the containers in which each sample is placed. If the only chemicals available are a bottle of dilute hydrochloric acid and some distilled water, describe a procedure that could be used to identify each solid. Write the net ionic equations for reactions that assist in identification.

I can't remember how to add a factored binomial. I need to solve for (x) in this equation:

30x+40x+10x^2=180

(Triangle because these are the interior angles on the triangle.)

I understand that you would factore the 10x^2, but then how would you add it to the other angles?

Help appreciated! Thank you!

im just trying to clean my profile.

id love to delete everything off my page. or delete everything up until like today. but, I dont think its possible..unless i havent heard, so im asking you.

any help on deleting more than one thing at once is helpful. its just extremely time consuming doing it one at a time. it never ends!!!

My sisters and I thought it would be fun to make a music video considering its called "hey soul SISTER" but, I'm just in need of a few extra ideas.

we don't have a whole lot of high tech stuff, I'm just wondering for any ideas of what to shoot, what to wear... still shots or actual video? anything cute(:

(I'm using the simple Windows Movie Maker if it helps)

thanks!!! <3

Last time I tried adding my friend onto my mobile phone, I accidentally signed up for HIS phone! So, then everytime he tried to talk to some one else, he was signed in as me and would kick me offline for having "two of me".

I am wondering what I type in for a phone number and where i go to add it?

do i have to do like

*example fone number* +1-272-511-978

and then is there an email i have to put at the end or sumthing? like

+-272-511-978@example.com

???

please this is important explain in as much detail you know of! I know how to operate every other yahoo thing, but not mobile phone :)

thank you very much

Quick Note: i do NOT have a phone to use either.thx

I tried last time and when i did i clicked the little phone on top of the messanger box where it lists all your contacts next to Yahoo voice.

so when i did i added my friends phone number into the box but i didnt know that i think i accidentally signed up for his phone cuz it said enter *your* phone number and i dont have a cell phone.

so i was able to IM him, but he was logged on to me and if he was talking to sumone else besides me, it would log me off cuz he was logged on as me!

so long story short heres my question haha sorry. How do i simply add someone as a friend using their mobile phone.

*and example phone number would help in the process*

please answer EVERYONE different opinions are needed cuz this is an important contact!

sorry 4 such a long question thank you!!

the book schooled.. about the hippie kid Cap (capricorn) anderson?

Thanks..

Much appreciated.. interested reader

:)

I downloaded some of those free game app things.. they looked cool even tho im not exactly sure what they are. Are they games? but anyways, they were completely downloaded onto my itunes, so i synced my ipod..... they should be on my ipod, but where do i go to find them? they aren't under the games tab on my actual I-pod (new nano)

HELP

i want to find them

i can never figure this out!

Ok, I have my first project of the year and I need some help. I am a great student, so I will not be asking for cheats or anything. That isn't even possible because, we haven't even learned anything in History class yet! But, I do have a project.. It's a time line project.I can't seem to find a good site providing me with historical events between 1550-1600.

If it is a site please provide with a link. If you know any major events let me know! I can't find anything anywhere and I'm stumped.

thank you for taking time to help me and it is much appreciated!

Nick Jonas Lover

(Pro-Jonas)

Thanks!

I was just curious a few days ago and plugged the JVC camera into our computer using a USB cord and it worked just fine..today when i tried after making a movie I plugged it in...this time nothing comes up on my computer and the screen on the actual camera says USB MASS STORAGE

i tried deleting some videos and it won't work... i asked this Q before and the advice I got was good but didn't work..

they said to try it again and unplug it and stuff

PLEASE help because I want to edit a video but it has to actually connect with my computer first! (the video camera)

please talk in simple term if possible! im not good with all this....only when i get lucky :)

lol

thanks!

Nick Jonas LOVER (Pro-Jonas)

I was just curious a few days ago and plugged the JVC camera into our computer using a USB cord and it worked just fine..today when i tried after making a movie I plugged it in...this time nothing comes up on my computer and the screen on the actual camera says USB MASS STORAGE

what does this mean? have you had this problem?? do i have to delete videos because i cant do that...

HELP soon please!!

thanks!

I dowloaded a video from vixy.net and I dont know where it went..i want to locate it so i can put it on windows movie maker..when it was dowloading it said it was being put in "Temporary Folder" but I can't find it under my documents or anything anywhere..where on earth do you go to find it?? Can you choose a certain folder b4 downloading?? I cant find anything that has been downloaded from that site..i need help ASAP ...Please and thank you sooo much~

I want to make a movie..with MOVEing clips...like music video parts and stuff to put on youtube..but before that i need to know how to get YOUTUBE into the Movie Maker...how do i do that

so if i use a downloader then where do i find what i downloaded to put in movie maker?? I need a LOT of help..like step by step..

what to click..any stuff like that!

i have NEVER done this..i've only done pics and like moving gifs that are copy and pasteable

:(

and want MORE fun and entertainment in my videos.. :)

look at my youtube if u want to see what i mean by MY videos as opposed to music vid/video ones

http://www.youtube.com/user/NickJonasRox4Ever

THANK YOUUUUU

Does anyone know of a site where there are like MINI clips/pictures that like move..where you can just like copy and paste them..NOT youtube..but i need a bunch..sort of like these''

http://th222.photobucket.com/albums/dd87...

http://photobucket.com/image/the%20nick%...

sry for saying "LIKE" a lot...i guess it annoys people...haha sorry! Please help..but only answer for HELP..not just to tell me how much you hate them cuz i really dont care...thanks

Does anyone know of a site where there are like MINI clips/pictures that like move..where you can just like copy and paste them..NOT youtube..but i need a bunch..sort of like these''

http://th222.photobucket.com/albums/dd87/mrsnickjo...

http://photobucket.com/image/the%20nick%20j%20show...

Is there any possible way to get a few songs onto the movie player withough burning them to a disc first. These are coming FROM itunes.. and if not that wat..any way to get the ones from itunes into Media Player so i could transfer?? I am trying to make my first ever youtube picture slide video! Thanks!!

I know its confusing but if you're good with computers please help! ( I know how do do pics :D yay lol)

please to step by step as much as possible!! thank you!!!

I would be glad to pick my best answer! :D

http://answers.yahoo.com/question/index;...

Another of my Questions..some what related to this! thanks again in advance

When I put pictures on they always get blurry once they are played in the video... Is there a way to make them show up clearer?? And not jumbled/blurry....unlcear..you get the idea!

thanks!

and if you know how to use itunes music check out my other question too please!

Is there any possible way to get a few songs onto the movie player withough burning them to a disc first. These are coming FROM itunes.. and if not that wat..any way to get the ones from itunes into Media Player so i could transfer?? I am trying to make my first ever youtube picture slide video! Thanks!!

I know its confusing but if you're good with computers please help! ( I know how do do pics :D yay lol)

please to step by step as much as possible!! thank you!!!

I would be glad to pick my best answer! :D