Answer:
5.60 Liters at STP
Explanation:
First you need the balanced reaction equation
2 H2 + O2 ====> 2 H2O
4 g of oxygen ( O<u>2</u> ) is 4/(15.999*2) moles of O2 (using periodic table)
Twice the number of moles of H2O re produced (from equation)
at STP the volume of a mole of gas is 22.4 liter/ mole
put all of this together
2 * 4 / (15.999*2) moles * 22.4 L/mole = 5.60 L
Answer:
91.7 kJ
Explanation:
Step 1: Given data
- Mass of ammonia (m): 66.7 g
- Molar heat of vaporization of ammonia (ΔH°vap): 23.4 kJ/mol
Step 2: Calculate the moles (n) corresponding to 66.7 g of ammonia
The molar mass of ammonia is 17.03 g/mol.
66.7 g × 1 mol/17.03 g = 3.92 mol
Step 3: Calculate the heat (Q) required to boil 3.92 moles of ammonia
We will use the following expression.
Q = ΔH°vap × n
Q = 23.4 kJ/mol × 3.92 mol = 91.7 kJ
Answer:
C.)house temperature increases cause the bimetallic coil to expand
Explanation:
A bimetallic strip is used in an air conditioner as a regulator. It is made up of two metals that behaves differently to a change in temperature.
To turn on the air conditoner, the circuit must be complete. When the temperature is high in a room, bimetallic strip responds by expanding and bending to complete the circuit. This puts on the air conditioner and the house begins to cool through exchange of warm and cold air.
When the temperature is too cold, the strip contracts and straightens. This process disconnects the circuit and the air conditioning system ceases to work.
NaCl and H2S will experience dipole-dipole interaction because they are permanently polarized.
