Tuesday
May 21, 2013

# Posts by monica

Total # Posts: 397

math
Draw one more rectangle using a ratio of 1:3 (a rectangle that is triple the width and length of the original shape). Determine and label the perimeter and area.

CHEMISTRY
. For which reaction is ƒ´Ssys ƒ® 0? A) CH4(g) + 2 O2(g) ¡÷ CO2(g) + 2 H2O(l) B) NH3(g) + HCl(g) ¡÷ NH4Cl(s) C) 2 NH4NO3(s) ¡÷ 2 N2(g) + O2(g) + 4 H2O(g) D) HCl(aq) + NaOH(aq) ¡÷ NaCl(aq) + H2O(l)

CHEMISTRY
14. Calculate ƒ´S0 for the formation of 1 mol of HI(g) from its elements given the following information: S0[H2(g)] = 131 J/mol∙K S0[I2(s)] = 116 J/mol∙K S0[HI(g)] = 206 J/mol∙K. A) 82 J/K B) 165 J/K C) 247 J/K D) 329 J/K

CHEMISTRY
The standard molar entropy of lead(II) bromide (PbBr2) is 161 J/mol • K. What is the entropy of 2.45 g of PbBr2? a. +1.07 J/K d. –161 J/K b. –1.07 J/K e. 0 J/K c. +161 J/K

CHEMISTRY
The entropy of a NaCl crystal is __________ a. an intensive property and a state function. b. an intensive property and a path function. c. an extensive property and a state function. d. an extensive property and a path function. e. not appropriately described in terms of an i...

CHEMISTRY
During a spontaneous chemical reaction, it is found that äSsys < 0. This means __________ a. äSsurr < 0 and its magnitude is < äSsys. b. äSsurr < 0 and its magnitude is > äSsys. c. äSsurr > 0 and its magnitude is < äSsys....

CHEMISTRY
If 1 mol of ice melts at its melting point of 273 K, the entropy change for the ice is 22.0 J/K. If the ice melts in someone’s hand at 34°C, what is the change in the entropy of the universe? Assume a final temperature for the water of 0°C. The enthalpy of fusion ...

CHEMISTRY
What is the entropy change to the surroundings when 1 mol of ice melts in someone’s hand if the hand temperature is 32°C? Assume a final temperature for the water of 0°C. The heat of fusion of ice is 6.01 kJ/mol. a. –188 J/K d. +19.7 J/K b. –22.0 J/K e. ...

math
For a tall kitchen bag the volume is set to be 240 in3. a. Write the polynomial K(x) = V(x) – 240 = _______________?

satistics
n=18,x=14,p=0.75 using binomial probablility

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