Answer: The answer is Z only
I’m assuming the answer choices are
1) x only
2) Z only - the answer
3) X and Y
4) X and Z
Explanation:
Answer:
The heat that must be supplied is 298.1 kJ
Explanation:
We must apply the calorimetry formula to solve this.
Q = m . C . ΔT
where Q is heat, m is the mass, C is the specific heat and ΔT the difference between Final temperature and Initial temperature.
The normal boiling point of water is 100° so ΔT = (100° - 20°)
Notice that units in specific heat are J/ g.K so temperature should be in K but in this case K and C are the same, because it is a difference.
T°K = T°C + 273
ΔT = (100° - 20°) = 80°
ΔT = (373° - 293°) = 80°
750g . 0.51 J/gK . 80K + 800g . 4.18 J/gK . 80K = 298120 J
The balanced chemical
reaction will be:
C3H8 + 5O2 = 3CO2 +4H2O
We are given the amount of propane gas to be burned. This will be
our starting point.
<span>0.025 g C3H8 ( 1 mol C3H8 / 44.1 g C3H8 ) ( 5 mol O2/1
mol C3H8)(32 g O2 / 1 mol O2) = 0.09 g O2</span>
A<span>toms are always bonded so that nearby atoms have to form into a compound and can be classified into different forms of compounds or molecules. It is also integral in our everyday life.</span>
The molarity of a solution if it tale 12.0 grams of Ca(No3)2 is calculated as below
molarity = moles/volume in liters
moles = mass/molar mass = 12.0 g/ 164 g/mol = 0.073 moles
molarity is therefore = 0.073/0.105 = 0.7 M