Chemistry, 05.01.2020 11:31 LuluMathLover101
How much heat does it take to melt 2.5 kg of lead when it is at its melting point (m. p. = 327.5°c; hf = 2.04 × 104 j/kg)?
6.2 × 10^1 j
8.2 × 103 j
5.1 × 10^4 j
1.7 × 10^7 j
it takes 2.52 × 10^5 j of heat to melt 4.00 kg of a substance. according to the table, what is the substance?
copper
iron
silver
gold
which of the following would you use to calculate the heat released when a liquid freezes?
heat of fuheat of vaporization
heat of condensation
heat of solidification
how much heat is required to completely boil away 0.200 kg of water (hv = 2.26 × 103 kj/kg)?
4.52 × 10^2 kj
2.26 × 10^3 kj
4.52 × 10^3 kj
1.13 × 10^4 kj
Answers: 2
Chemistry, 21.06.2019 18:30, jadepotts3965
Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)
Answers: 2
Chemistry, 22.06.2019 23:00, ceejay8005
The data below were determined for the reaction shown below. s2o82– + 3i – (aq) → 2so42– + i3– expt. # [s2o82–] (m) [i –] (m) initial rate 1 0.038 0.060 1.4 × 10 – 5 m/s 2 0.076 0.060 2.8 × 10 – 5 m/s 3 0.076 0.030 1.4 × 10 – 5 m/s the rate law for this reaction must be:
Answers: 1
Chemistry, 23.06.2019 16:30, mbonham481
Amodel of an atom is shown below. which element is represented by this model of an atom? boron, carbon, neon, or sodium?
Answers: 1
Chemistry, 23.06.2019 21:30, nsbegay2007
The conversion factor relating feet to meters is 1ft=0.305m. keep in mind that when using conversion factors, you want to make sure that like units cancel leaving you with the units you need. you have been told that a certain house is 164 m2 in area. how much is this in square feet?
Answers: 1
How much heat does it take to melt 2.5 kg of lead when it is at its melting point (m. p. = 327.5°c;...
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