ПОМОГИТЕ СОСТАВИТЬ ДАНО ПО ЗАДАЧЕ!!!                                             

 

Какой объем (н.у.) углекислого газа выделится при обжиге известняка (CaCO3) массой 800 г. с массой долей примесей 12 % (CaCO3-->CaO+CO2)

do you know how to use these words?

this
these
here
come
that
those
there
go

I'd like to come / go away for a holiday again soon.
You must come/ go and see us again one of these days.
Let's all come/ go and see Harry this weekend.
I've found something very strange. Come / go and have a look.
I'm afraid Mrs. Barnes is busy just now. Could you come / go back tomorow morning.
Do you know Africa? - No , I' ve never been here/ theere
-This / that is my first visit!
I'll never forget this/ that morning , 20 years ago when I first saw Mrs. Newton .
Jane, I'd like you to meet Peter. Peter , this / that is my friend Jane
Who were these/ those people you were with last night.

При взаимодействии раствора серной кислоты с 24 г магния образуется водород объемом

На доске были написаны десять последовательных натуральных чисел. Когда стерли одно из них, сумма девяти оставшихся оказалась равна 2000. Какое число стерли?