carobug5

When 0.2235g of strontium reacted with 25.00mL of 1.168 M HCl, 63.18g of H20 (water) was displaced by the H2 gas produced. The temperature in the reaction flask was 27.0 degrees C and the barometric pressure was 777 Torr. The molar mass of strontium is 87.62g/mol. At 27.0 degrees C the vapor pressure of water is 27.0 Torr and its density is 0.9965g/mL. When the final reaction mixture was titrated with 0.6137M NaOH, the endpoint was reached when 39.25mL of base were added.

d. Calculate the number of moles or unreacted HCl left in the reaction mixture.

In other parts, I found the moles of gas collected to be 0.00252 mol H2, the volume of gas collected to be 63.40 mL, and moles of HCL used to be 0.005102 mol HCl. How would I set up part d?

When 0.2235g of strontium reacted with 25.00mL of 1.168 M HCl, 63.18g of H20 (water) was displaced by the H2 gas produced. The temperature in the reaction flask was 27.0 degrees C and the barometric pressure was 777 Torr. The molar mass of strontium is 87.62g/mol. At 27.0 degrees C the vapor pressure of water is 27.0 Torr and its density is 0.9965g/mL. When the final reaction mixture was titrated with 0.6137M NaOH, the endpoint was reached when 39.25mL of base were added.

c. Calculate the number of moles of HCl used as a reactant.

How would I do this? I have the balanced equation set up ( Sr + 2HCl ----> SrCl2 + H2), but I'm stuck after that.

Any help would be greatly appreciated, Thanks!

Carbon dioxide is considered to be the green house gas of greatest concern with respect to global warming. A considerable amount of carbon dioxide is produced upon the combustion of gasoline. If you assume that gasoline is mostly octane, C8H18, then the combustion reaction is

2 C8H18(l) + 25 O2(s) ---> 16 CO2(s) + 18 H2O(l)

a) If you burned 1352 g (which is about 1 quart) of octane, C8H18, how many grams of oxygen, O2, are required?

b) How many grams of CO2 is produced?

Why would a frog risk becoming vulnerable to predators by croaking to find a mate?

(A) The frog knows it needs to reproduce sexually to have variable offspring

(B) Only frogs that croak are able to leave offspring in the next generation

(C) Males aren’t able to reproduce asexually like females so they must find a mate

I know it's not (A) because this is my second time doing this review-quiz-thing and it told me that it was wrong. I'm just trying to understand whether (B) or (C) are the correct answers. I could see it being the former because the croak is like a mating call and announces to females that they want to do the do. But, after a quick search online, I got results saying some frogs, like the Tungara frog, are asexual; this supports choice (C). We were actually shown a video about the Tungara frog so I feel like it could be (C). The females can only produce via parthenogenesis, though. Help, please? Haha. :)

I want to run both Windows and OS X on my computer. Is it possible? I know it's possible on Mac's and would be much simpler, but I'm trying to make due, haha. Anyway, is it possible to dualboot/multiboot on an inherently Windows PC. (I'm running a 64x version of Windows 7 Home Premium if that makes a difference)

Lately, I've been wondering if my guy best friend (I'm female, by the way) has feelings for me. I have them for him, but I'm oblivious to signs in general. For perspective, we've known each other for over six years, are now 18 and are currently attending the same college. Generally, we talk to each other about everything. He still talks about a girl he likes, and that makes me have doubts.

But, we've started hanging out alone a lot more. Recently, we went to a sporting event and a movie by ourselves. Usually, he makes sure to have more people, but this time, he almost tried to make sure it was just us. We talked about past relationships and what each of us would want from the future.

Twice in the past it's come out (from the loose lips of a former friend) that I liked my guy best friend. Honestly, I wasn't ready for a relationship at those points and that's why I didn't say anything. He has said that he "knew" those times. I thought it was weird because at the height of me liking him was when we were the closest. Also, for my birthday, he painted a picture of two cats forming a heart with the spots on their backs. I jokingly asked for it and he actually gave it to me.

Sorry for the long and rambling post, but if anyone has any advice or observations, that would be neat. I can provide other info too, if you want. :)

What is the best/cheapest way to send and receive calls internationally. I'm headed to Europe and I need to stay in contact with family in the U.S. If they use Straight Talk, can they receive calls I make to them and vice versa? I am on an AT&T plan.

I'm headed out of the country for about 9 days over the summer, but I have two small-breed dogs. (Dachshund Jack Russel Mix) The Vet quoted an astronomical price. Are there any alternatives? There will be someone checking in on the house daily. I live at a rural farm residence. Would it be okay to leave them outside in a chain kennel? Any input would be greatly appreciated.

To start off, I'm 17 and my boyfriend and I have been dating for about three months. I really do like him and have strong feelings for him. The problem I have is that I've had feelings for my best guy friend for years. I feel like it's taking away from the relationship I have with my boyfriend, like I'm not as committed as I should be. Should I tell one or both? Although most signs point to my friend having romantic feelings towards me, I can't help but to think he would deny it no matter what. And like I said, I really like my boyfriend and I don't want to lose him over something that I should just "get over". I don't want to be a villain, but I... I don't know.

I'm trying to connect my HTC Inspire to my Lenovo G580 runing Windows 7. My computer can't find and install several peripheral drivers. Are there any ways that I can somehow download the driver from the Internet. Is there something I can do? Thank you! :)

I'm using a Windows 7 laptop. I've tried downloading Java but I just haven't succeeded. I've downloaded the .exe file, but when it comes to load the installer, I'm told that i can't.

Title: Java (TM) Platform SE binary - Security Warning

Windows has found a problem with this file

Name: jre.1.7.0_06-c.msi

Publisher: Unknown Publisher

I've tried unblocking the original file, but no cigar. I've also tried both the on and offline version of the download.

I'm open to ANY relevant suggestions. Thanks you. :)

I received a copy of the Sims 3 Plus Pets for my birthday which happened recently. Once I installed the game, I tried to make a sim, but their features were so deformed that I didn't find it to be worth it. Even the pre-made ones were equally glitched. My laptop meets all of the requirements as well. I've included a picture of a sim. If anyone has an idea on how to fix this, it would be greatly appreciated :)

https://twitter.com/#!/XC_Wildcat_07/status/183745...

I'm planning on upgrading to a smartphone (The Samsung Galaxy S2) and I was wondering if I had to give up my unlimited data plan. Although I'm grandfather clause'd in with my "dumbphone," will I be able to keep it if I upgrade? Thanks :)

I just completed Driver Education and received the MV 285 certificate. Also, I'll have had my permit for six months as of September 21, 2011. I'll still be 16 at that time. My question is this; If I've completed Driver Ed, can I receive a full Driver's License before I turn 17?

Thanks :)

To start off I'm a 16 year old girl. Not too old, I know, but I would like some person's advice. I really like my best guy-friend.

Well, we met about three years ago. Now, I'm kind of falling for him. (I know I'm being redundant...) Moving on. His sister thought we dated back then, but of course we didn't. The following year, we went to ninth grade. At a track meet, I said "Hi" to his parents for no apparent reason. The next week, after Prom, he told me that his parents thought WE had gone together. We laughed it off. That summer, we met up at the fair. We were walking around and one of the guys running the game stand said something along the lines of, "Come here and win your girl a prize" He played along with it and I said nothing. It was a lot of fun. Then after telling our other friends, they told me that we look like a couple when we walk. (Hmmm.) This present year, I got him a carnation as a joke during our school's Valentine's Day Carnation Sale. His sister asked if it was me and I told her. She then told me that her mom assumes it's me every time he gets a flower from these sales. (I wonder why?)

So, do you think I should pursue anything out of this, or not?

Please and Thank You :)

The only thing is it can't be the guitar music. Thank you :)