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  • Question #7af06 - Socratic
    Once you're certain that the units match, isolate whichever variable you must determine on one side of the equation and plug in your values As a side note, Dalton's Law of Partial Pressure is applicable for gaseous mixtures, i e when you have two or more gases in the same volume
  • Question #da1ce - Socratic
    T_"f" = 73^@"C" The idea here is that the heat lost by the hotter liquid will be equal to the heat gained by the colder liquid color(blue)(q_"gained" = -q_"lost
  • Question #1b0c9 - Socratic
    You have "0 239 kg" of ideal gas in your cylinder So, you know the volume your gas occupies, and the temperature and pressure at which it is kept Because you were given its molar mass, you can solve for its mass by using the ideal gas law equation, PV = nRT, to determine how many moles are present in the cylinder SInce you know the weight of 1 mole, determining the number of moles will help
  • Question #ade0c - Socratic
    Here's what I got The idea here is that the heat given off by your reaction will be absorbed by the calorimeter -q_"given off" = q_"absorbed" The minus sign is used here because heat given off carries a negative sign So, you know that the temperature of the calorimeter increased by 3^@"C", since DeltaT = 28^@"C" - 25^@"C" = 3^@"C" Notice that the calorimeter has a heat capacity of "1 kJ K
  • Question #86d62 + Example - Socratic
    Start with equation 3 It contains the first compound in the target (CS₂) We reverse equation 3 and its ΔH to put the CS₂ on the left and get equation A below A CS₂(l) → C(s) + 2S(s); - #ΔH_f# = -87 9 kJ Now we eliminate C(s) and S(s) one at a time Equation 1 contains C(s), so we write it as Equation B below
  • Question #2e81a - Socratic
    2 17 * 10^(28)"photons" The first thing to do here is determine how much energy in the form of heat is required to increase the temperature of that sample of coffee from 25 0^@"C" to 62 0^@"C"
  • Question #f37a1 - Socratic
    Algebra Quadratic Equations and Functions Vertex Form of a Quadratic Equation 1 Answer Binayaka C
  • A helium balloon at 28 degrees Celsius has a volume of 1. 8 L . . . - Socratic
    Note: The temperature for gas laws must be in Kelvins, so the Celsius temperatures will have to be converted Known #P_1="102 kPa"# #V_1="1 8 L"# #T_1="28"^@"C + 273 15"="301 K"# #P_2="85 kPa"# #T_2="4"^@"C + 273 15"="277 K"# Unknown #V_2# Solution Rearrange the equation to isolate #V_2# Plug in the known values and solve #V_2=(P_1V_1T_2
  • Question #18acf - Socratic
    0 341dm^3 1 mole of any ideal gas occupies a volume of 22 7dm^3 at STP We will use this fact to work out the volume of oxygen produced From the equation, we are given the mole ratio H_2O_2:O_2=2:1 But we have 0 03000 moles of peroxide H_2O_2:O_2=2:1 =0 03:0 015 mol (I'm cutting off the extra 0s to make it easier to read In reality, you should probably leave these in) Back to the fact given





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