C. It remains constant D. None of above 40. What is the solubility in grams of s

Question

C. It remains constant D. None of above 40. What is the solubility in grams of solute per 100 grams of water at 20° C of potassium nitrate (KNO3) A. 50 B. 40 C. 30 D. 20 41. In 100 g of water at 80° C are 25 g of NaCI dissolved. This solution is? A. Unsaturated solution 8. Saturated solution C Supersaturated solution D. None of the above 42- Select the correct name of HBr A. bromic acid B. bromous acid C hydrobromic acid D. bromiric acid 43. Ca(O) A. Calcium hydride B. Calcium hydrogen oxide C.Cacium oxygen hydride D. Calcium hydroxide 44- Identify the one which is not an acid-base conjugate pair. A. HNO, NO B. HCI, CIO C. HS, H2S D. NH, NH 45- What decay is represented in the following nuclear reaction? A. beta + B. alf C. beta D. gamma 46. Identify the correct complete and balanced equation for the following reactants CO (g)+ 02 (g) A, 2 CO(g) + 202 (g) CO2 (g) B. CO(g) + O2(g) CO(g) C, 2 CO(g) + O2(g) 2CO2(g) D, CO (g) + O2(g)2CO2 (g)

Explanation / Answer

Q40

solubility is approx 25-30 g per 100 g

from the list, nearest answer is 30 g

Q41

]S = 40 g of NaCl per 100 g

then, if we add only 25 g, this must be below Saturation

choose unsaturated

Q42

HBr = this is an acid, with bromine, so

hydromust be stted

hydrobromic acid

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