Answer:
2H₂ + O₂ → 2H₂O
Explanation:
The expression of the equation is given as:
_H₂ + 2O₂ → 2H₂O
Now for expression above,
Reactants Products
H 2 4
O 4 2
to balance the equation, we use 2 moles of hydrogen gas and 1 mole of oxygen gas;
2H₂ + O₂ → 2H₂O
The answer gonna be: 1/2^n = 1/2^4 = 0.0625
So, 6.25% sample has not decayed yet!!!
The answer is D. Rubber. Because A, B, and C are metal materials that will insulate heat without any gaps. Hope this helped!
D) Silicon is an example of a metalloid.
It has some of the properties of metals and some of the properties of nonmetals.
In the Periodic Table, metalloids sit on either side of a zig-zag line separating metals from nonmetals.
In the diagram below, Fe and Au are metals, while He is a nonmetal.