True
It is the isotope which is commonly used.
Mass of Oxygen : 18.8 g
<h3>Further explanation</h3>
Reaction(balanced) :
4Fe + 3O₂ → 2Fe₂O₃
mass Fe = 43.7 g
mol Fe(MW= 55,845 g/mol) :
mol O₂ : mol Fe = 3 : 4, so mol O₂ :
Mass O₂(MW=32 g/mol) :
Or simply you can Conservation of mass, where the masses before and after the reaction are the same
<em>mass reactants=mass products</em>
mass iron+mass oxygen=mass iron (III) oxide
43.7 g + mass oxygen=62.5 g
mass oxygen = 62.5 - 43.7 = 18.8 g
In the parallel circuit, each lamp will receive 100 volts.
<h3>
Equivalent resistance of the parallel circuit</h3>
The equivalent resistance of the parallel circuit is the inverse sum of the resistance of the two resistors in the circuit. This is as a result of different current flowing in each resistor parallel circuit arrangement.
The equivalent resistance is calculated as follows;
1/R = 1/10 + 1/10
1/R = 2/10
R = 10/2
R = 5 ohms
<h3>Current in each resistor</h3>
I = V/R
I = 100/10 = 10 A
<h3>Voltage in each resistor</h3>
V = IR
V = 10 X 10 = 100 V
Generally, for a circuit in parallel connection, same voltage will flow in each resistor of the circuit while different current will flow in the resistors.
Thus, the correct statement is, "Each lamp will receive 100 volts".
Learn more about circuit in parallel arrangement here: brainly.com/question/19929102
b.
Same because, mass doesn’t count liquid or solid
