a) how high is the salt in a solution of 800g water, 50g alt and 500g 2,5 saltsolution?
b) A detergent that is bought 20% strong and is going to be thinned to the proportion 3:50. What strenght does the ready detergent have?
c) How much 45% acid must be pourd into 500ml 12% acid to make a 30% acid?
Whole calculations and answers please iw been hitting my head in the wall for 2 days now.