Gallium, a metal, has a freezing point near room temperature so it can be melted
ID: 999580 • Letter: G
Question
Gallium, a metal, has a freezing point near room temperature so it can be melted by holding it in your hands. If gallium's melting point is 302.8 K, what is that temperature in degree C? 39.8 degree C 0.0 degree C 29.8 degree C 575.8 degree C 302.8 degree C What volume is occupied by 14.3 g of mercury? Density = 13.6 g/mL. 37.2 mL 1.05 mL 0.236 mL 193 mL 4.82 mL Which element has the largest atomic radius? P Si Al S Cl The number of electrons present in the s orbitals in the outermost electron shell of the alkaline earth (Group IIA) metal is one three four five two What mass of silver nitrate, AgNO_3, is required to prepare 800.g of 3.50% solution of AgNO_3? 24.6g 26.7 g 27.0g 28.0 g 25.5 g What is the total number of electrons in the fifth energy level (n = 5). 32 18 25 16 50 Which of the following is the electron configuration of F-? 1s^2 1p^6 2s^2p^6 The phosphorus pentachloride molecule is nonpolar and contains to lone (unshared) electron pairs on the phosphorus atom. What are all of the possible Cl-P-Cl bond angles? 109.5 degree 90 degree, 120 degree, and 180 degree 90 degree and 180 degree 120 degree 180 degree The element whose symbol is Ca is cadmium. californium. carbon. calcium. none of these.Explanation / Answer
18. C
302.8-273 = 29.8C0
19. b
mass = volume * density
volume = mass/density
= 14.3/13.6 = 1.051ml
20. c
Al
21. e
ns2 general electronic configuration of IIA group elements
22. d
3.5% of AgNO3 means 3.5gm of AgNO3 present in 100gm of solution
3.5*800/100 = AgNO3 present in 800gm of solution
28gm of AgNO3 present in 800gm of solution
23. e
2n2 = 2(5)2 = 50
24.d
25.b
90 and 120
26. d
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