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# davrosG5

Member

60

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• Title
Member

## System

• CPU
Intel i7-4790K
• Motherboard
Asus z97-ws
• RAM
16Gb
• GPU
GTX970
• Case
Corsair Obsidian 650d
• Storage
Samsung 850Pro 512Gb, WD Black 1Tb, WD Green 4Tb
• PSU
Corsair AX860i
• Display(s)
NEC Multisync PA272W
• Cooling
Noctua NH-U14S
• Sound
On-board
• Operating System
Windows 10Pro, 64bit

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1. ## Need help, anyone good at chemistry perhaps?

Okay: 5g NaOH = 5/40 moles = 0.125 moles NaOH (in 120mL = 1.042 moles/L) 200 mL of 0.2M HNO3 = 0.2moles/L x 0.2L = 0.04 moles HNO3 You can ignore the Na+ and NO3- counter ions. H+ + OH- -> H2O The OH- is in excess so effectively 'all' of the H+ is neutralised so your final OH- concentration is 0.125 - 0.04 moles = 0.085 moles You have 0.085 moles of OH- in 320mL of water so you [OH-] = 0.085 moles/0.32L = 0.265625 moles/L pOH = -log10 (0.265625) = 0.5757 14 = pH + pOH pH = 14 - pOH = 14 - 0.5757 = 13.4243 or about 13.4
2. ## Need help, anyone good at chemistry perhaps?

Both components are 'strong' so you don't have to worry about the ionisation potential of either - it would be different if you had something like acetic acid or ammonia for example. pH is the -log (to the base 10) of the Hydrogen ion concentration It's counterpart, pOH is the -log (to the base 10) of the Hydroxide ion concentration. The sum of pH and pOH is 14 so once you know the concentration of one of the ions you can work out the rest. You said you had worked out the concentrations - the acid will have been completely neutralised as the NaOH was in excess. Whatever your final NaOH concentration is also the OH concentration so you can calculate the pOH value then subtract it from 14 to get the pH. I got a pH of ~13.4.
3. ## What if I don’t send back a item that I got a replacement from? Or if I don’t send back a return?

If you are in the UK then the seller is required to cover the cost of returning a faulty item: Which? Letter template
4. ## Im Trying to build a gaming pc with a server board.

Looking at the mobo manual and your photo you appear to have installed the FB-DIMM's incorrectly. The ram slots are in 4 banks and for 6 DIMM's as shown should be installed in matched pairs as follows: 1A (nearest the PCI/PCIe slots) 1B 2A 2B 3A 4A Refer to section 2-6 of the mobo manual. I used to have a MacPro with FB-DIMM's and it was incredibly sensitive to having exactly matched modules otherwise it wouldn't recognise half of them and I got the distinct impression that was just a FB-DIMM thing. It looks like you're mixing several different modules going by the colours of the heat spreaders. Have you tried with just the orange modules (which would need to be installed 1A, 2A, 3A, 4A), assuming they are all the same size and spec?
5. ## would right to repair legislation actually be good for manufacturers like Apple?

Right to Repair is definitely not int he interest of the companies - it would impact their bottom line both in terms of reduced sales and also having to stock parts for an extended period of time. Companies that appear to be friendly to RTR are doing so to undermine their competitors, it's that simple. As a consumer, I'd certainly like to see greater repairability in a number of devices and/or longevity but you've got remember that companies aren't in it for consumers *whatever they may profess in public), they are in it for their owner whether that's shareholders, private equity or whatever. It's also worth remembering that computer products are increasingly comoditised and essentially designed to be disposable rather than repairable. It applies to pretty much everything from cars to domestic white goods. How user repairable do you think a Tesla car is despite its substantial cost? For example, various companies (not just Apple) have argued that consumers expect products like phones and laptops to get thinner and thinner over time and that's what they've delivered. However there is a trade-off to make things thinner - if you want interchangeable and easily accessible swappable parts it's a lot harder to thin things down. For example, a replaceable battery needs to be in a reasonably robust outer package so that it can survive being handled and installed and removed multiple times. If the battery component is sealed inside the body of the device and can't be (easily) removed or accessed it can be thinner and/or an odd shape to make better use of the available space. Moving away from phones etc, have a look at Intel's NUC products - the CPU is a soldered component - a packaged replaceable one takes up more space. You're trading off size against repairability and it's not practical to please everyone so the companies go where the biggest market is. Companies won't make things more repairable unless there is an imperative to do so. That could come from government legislation but the most effective driver would be consumer demand. If companies making super thin sealed phones and laptops start losing out to competitors selling user upgradeable ones in a big way they'll shift tack very quickly but that would require the majority of consumers, not just the highly vocal but relatively niche tech savvy folks (like on here), to do more than moan about prices and actually change what they prefer to buy. Edit: If you look at computers, it is possible to get ones that do lean more towards longevity - the ones sold to business customers by the likes of HP and Dell will often have a guaranteed 'serviceable' period where the manufacturer commits to hold stock of spares etc for s defined period of time (like a minimum of 5 years from product launch for example). But again, you have a trade-off - these systems will usually have a pretty locked down specification in the first place and/or you'll pay a higher price than you would for 'consumer' grade PC with similar specs.

Ah dog farts. My old dog Tom (also a Collie) once released a guff while lying in the middle of the livingroom. He raised his head to look at his own backside and decided that was good time to leave the room - even he didn't like his own brand (at least that time). Suffice to say the rest of the room occupants got hit with it just after he'd slinked out the room.

Dogs have owners, cats have staff. In other news, this is Glen, my parents dog: His propensity for enjoying playing with rocks has had an adverse effect on his teeth (of which he has few left), hence the sticky out tongue. The disaster that are his teeth don't seem to bother him as he really likes chewing up ice cubes. In his younger days he had a habit of periodically receiving new instructions from the mothership (he'd stop dead and start at the lights in the livingroom for a few seconds then go on about his business). Border collie in case you can't tell.
8. ## What do you say when someone asks you if you like Football/sports? (and you don't)

IT Crowd? I usually say I prefer rugby. But I don't really watch sport much at all.
9. ## Surge Protection

Do you actually mean a surge protector? A surge protector is designed to protect your appliance, whatever it is, from electrical surges from the mains electricity supply. I don't see any way this would help with the situation you described. If the fault with the washing machine was caused by a power surge it's too late - the damage has already occurred. You could get a simple timer switch so you could set it to switch off the power around the end of the washing cycle or look to have the timer device in the washing machine repaired. Alternatively, you could just replace the washing machine with a properly working one - if you do that then, assuming the original timer fault was actually caused by a power surge, getting a surge protector might be worthwhile depending on how reliable or otherwise your electrical supply is.
10. ## Toral cost of my custom case 'if' I'm going to build the itx case

You’ve heard of Protocase? Also, anodising is generally what you can do with aluminium (it’s increasing the thickness of the naturally occurring oxide layer, in steel you’d end up with rust).
11. ## Who's your favorite Muppet/Puppet?

Beaker. For I too am a ginger scientist!