x gm of sample containing 38.56% Na2CO3 is adulterted with NaCl. The sample was dissolved in water in 250ml flask. 25ml of this dilute solution required 75.5ml of 0.1N H2SO4. Find the value of x.​

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

Salt in oceans comes from and of rocks

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.