chemistry questions?

Question

the number of grams of KNO3 that will dissolve in 100g of H2O at 100 celsius.

the number of grams of water required to dissolve 20g of KNO3 at 100 Celsius.

the number of grams of water required to dissolve 2.0 g CuSO4 * 5 H2O at 100 celsius

the number of grams of water required at 100 celsius to dissolve a mixture containing 20 g KNO3 and 2.0 g CuSO4*5H20 assuming that the solubility of one substance is not affected by the presence of another.

Answer 1

KNO3: 247g dissolves in 100 cu cm water at 100C
CuSO4*5H2O: 203.3g dissolves in 100 cu cm water at 100C

Let CuSO4*5H2O, copper sulfate pentahydrate, be called CSP

a) 247g

b) 20gKNO3 x 100cucmH2O/247gKNO3 = 8.1 cu cm H2O

c) 20gCSP x 100cucmH2O/203.3gCSP = 9.8 cucm H2O

d) 9.8 cu cm H2O, because that is the amount needed to dissolve the CSP, and more than enough to dissolve the KNO3.

Answer 2

a million. From a edge view of a e book, you will see that there is two factors of the hide and pages. this means that the thickness could be: Thickness = 2 hundred * web site length + 2 * hide length = (2 hundred*0.10mm)+(2*0.020mm) = 20.04 mm = 2.004 cm 2. quantity = length * width * top = 10cmx2cmx2xm = 40 cm^3 A 2cmx2cmx2cm block is of quantity 8 cm^3. while you're taking the full quantity of the metallic block and divide it by the quantity of each guy or woman block, you could discover what number blocks you choose: 40 cm^3/8cm^3 = 5 blocks Chemistry questions: - Evaporation is the unquestionably technique of taking a substance and changing is from liquid section to gasoline section. Boiling is the factor the place the stress exerted by the liquid suits the encompassing tension, for this reason inflicting the substance to start evaporating. - the better tension you have, the tighter the air is packed, and the extra the capability of the molecules is contained and conserved. The capability of the molecules, at our point is indicative of warmth. for this reason, the extra tension exists, the hotter the contained product will become... which permits speedier and much less stressful cooking (considering you ought to hold onto extra warmth for an prolonged quantity of time).