Help

Given the following balanced chemical reaction:

4 A + 3 B2 ---> 2 A2B3

If 12 moles of A are reacted with excess B2, how many moles of A2B3 will be produced?

It is an online quiz where i am offered more than 1 chance. My assumption is that this is a very basic question, the since the mole ratio is 4:2 for A:A2B3. Given 12 moles, the answer should be 6 moles of A2B3. I tried entering "6 moles" and it came back wrong. Then I tried "6.0" thinking units were possibly unnecessary, but neither was correct. Does anybody know what I'm doing wrong

Long story. I can't answer this on my own. I really need help. If you're going to say anything mean about me or her, then please just go away.

I'm a 20 year old guy. I am a sophomore college student. I have been seeing a girl for just over a year, she is a freshman at a college 45 minutes away. I love her and she loves me. We honestly think we're perfect for each other. Here's the catch... She get really lonely when I'm not around. And I can only see her on weekends. I found out that she kissed another guy (more than once) and she had cuddled with him, but she didn't take it any further as most might assume. I can promise you that it didn't go further. I broke up with her a couple days ago when I found out. She came clean about everything and told me how sorry she was and realizes that I have lost trust. Is it okay to restart from the beginning and let her show me that she can be trustworthy and not to make this mistake again? She has cried for 2 days straight now. Is it possible for the relationship to be back to its glory days or will it never be good again? I'd hate to ask strangers for help with this but I'm fighting myself. Thanks for your help.

I'm 19, have my first actual "date" tomorrow. We are both kinda nerds. We are going to dinner and a movie.. We've texted a lot but a friend set us up and we've never really talked before. She is going to meet me where we're going (not my choice, I wanted to drive). I feel like when I get out of the car and go up to say hi, it's going to be very awkward and I was wondering if you had any tips.

It seems to happen mostly when going down hill to a stop sign or in parking garages. It happens once or twice a week. All the gauges just go down and I have to go into neutral or park and start it up. Usually starts right up and the person behind me might not even know what happened. however the last time that it stall, it wouldn't start right back up like normal, I had to turn the key around 10 times. Before the stall, the rpm's go nuts up and down between 500-1200 rpms and then shuts off. If I have enough time to react, I can hit the gas and prevent it from stalling. I just want to fix the problem. Anybody know what it could be!!!! thanks. NO CHECK ENGINE LIGHT (READ THE CODE ANYWAY-NOTHING). RECENT TUNE UP (RUNS NICE, STILL STALLS THOUGH)

It seems to happen mostly when going down hill to a stop sign or in parking garages. It happens once or twice a week. All the gauges just go down and I have to go into neutral or park and start it up. Usually starts right up and the person behind me might not even know what happened. however the last time that it stall, it wouldn't start right back up like normal, I had to turn the key around 10 times. Before the stall, the rpm's go nuts up and down between 500-1200 rpms and then shuts off. If I have enough time to react, I can hit the gas and prevent it from stalling. I just want to fix the problem. Anybody know what it could be!!!! thanks