<span>50.2 kJ = 333 kJ/kg * mass of water
mass of water is 0.15075075075075075075075075075075 kg
therefore mass of unfrozen water is 0.10924924924924924924924924924925 kg</span>
Answer:
There is 2.52 L of O2 collected
Explanation:
Step 1: Data given:
Temperature = 22.0 °C
Pressure = 728 mmHg = 728 /760 = 0.958 atm
Mass of KClO3 = 8.15 grams
Molar mass of KClO3 = 122.55 g/mol
Step 2: The balanced equation
2KClO3(s) → 2KCl(s) + 3O2(g)
Step 3: Calculate moles of KClO3
Moles KClO3 = mass KClO3 / molar mass KClO3
Moles KClO3= 8.15 grams / 122.55 g/mol
Moles KClO3 = 0.0665 moles
Step 4: Calculate moles of O2
For 2 moles of KClO3 we'll have 2 moles of KCl and 3 moles of O2 produced
For 0.0665 moles of KClO3 we have 3/2 * 0.0665 = 0.09975 moles
Step 5: Calculate vlume of O2
p*V = n*R*T
V = (n*R*T)/p
⇒ with n = the number of moles O2 = 0.09975 moles
⇒ with R = the gas constant = 0.08206 L*atm/K*mol
⇒ with T = 22.0 °C = 273 +22 = 295 Kelvin
⇒ with p = 0.958 atm
V = (0.09975 * 0.08206 * 295) / 0.958
V = 2.52 L
There is 2.52 L of O2 collected
Answer:All materials are made up from atoms, and all atoms consist of protons, neutrons and electrons. Protons, have a positive electrical charge. Neutrons have no electrical charge (that is they are Neutral), while Electrons have a negative electrical charge. Atoms are bound together by powerful forces of attraction existing between the atoms nucleus and the electrons in its outer shell.
All materials are made up from atoms, and all atoms consist of protons, neutrons and electrons. Protons, have a positive electrical charge. Neutrons have no electrical charge (that is they are Neutral), while Electrons have a negative electrical charge. Atoms are bound together by powerful forces of attraction existing between the atoms nucleus and the electrons in its outer shell.
Electrical Voltage
Voltage, ( V ) is the potential energy of an electrical supply stored in the form of an electrical charge. Voltage can be thought of as the force that pushes electrons through a conductor and the greater the voltage the greater is its ability to “push” the electrons through a given circuit. As energy has the ability to do work this potential energy can be described as the work required in joules to move electrons in the form of an electrical current around a circuit from one point or node to another.
Then the difference in voltage between any two points, connections or junctions (called nodes) in a circuit is known as the Potential Difference, ( p.d. ) commonly called the Voltage Drop.
he Potential difference between two points is measured in Volts with the circuit symbol V, or lowercase “v“, although Energy, E lowercase “e” is sometimes used to indicate a generated emf (electromotive force). Then the greater the voltage, the greater is the pressure (or pushing force) and the greater is the capacity to do work.
A constant voltage source is called a DC Voltage with a voltage that varies periodically with time is called an AC voltage. Voltage is measured in volts, with one volt being defined as the electrical pressure required to force an electrical current of one ampere through a resistance of one Ohm. Voltages are generally expressed in Volts with prefixes used to denote sub-multiples of the voltage such as microvolts ( μV = 10-6 V ), millivolts ( mV = 10-3 V ) or kilovolts ( kV = 103 V ). Voltage can be either positive or negative.
In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits<span> into smaller parts (lighter </span>nuclei<span>). Hope this helps</span>
