Hopefully chick will be fine. They know where food and water are when they are hungry and thirsty. An old fashioned mop head is a good substitute mum, as they can snuggle under it 
Have you not had hens before? Why did you get chicks and not older hens ....sorry for the questions, just thought older hens would have been easier and less stressful for you.
I am in tears, little chick has gone

last night, i put her back in with other 2 as they all go to sleep at night and thought it be ok, as nowhere to put her cage at night, light is too bright where we sleep, woke up this morning, she was just sitting there, i picked her up and she would not walk, wanted to hang her head down, cheaping away, thought she might not have had any water so got a new sponge and dropped water in her beak a lot missed, but she was panting, so she got a few drops, she was cheaping as she likes your hand over her body to make her all snug, but she was dying slowly, i cuddled her in my jumper, just holding her, but she has gone, i am soooooo upset. There is no blood on her, her bum is all dry and fluffy, just 1 strand of fluff wet, so i dont know if the duck was pecking her last night as she was dry, not a mark on her, could it have been stress if duck was pecking her, usually you see where he has been as his beak is always wet with the water, or what could it have been?
I am never getting chicks again, he just gave me chicks, no idea why, told him i am new to this, now i blame myself for killign 3 of them as i have not a clue what ia m doing, i just come on here follow advice, she was perfectly happy last night. My fault if i never put her back in and let her be and so be it if the dam light was on, she would still be here.
I am never ever buying chicks again, too upsetting.