Answer:2H2O2 → 2H2O + O2
Explanation:
For a chemical equation to be balanced, the number of moles of each element at the reactant must be equal to that of the product.
According to the equation given
H2O2 → H2O + O2
There are two hydrogen atoms with two oxygen atoms at the reactant and 2hydrogen and 3oxygen at the product which shows the equation is not balanced. To balance this,
We will add 2 moles to H2O2 at the reactant and 2 moles to H2O at the product to give;
2H2O2 → 2H2O + O2 (Balanced equation)
As we can see that we now have 4 moles of Hydrogen and 4 moles of oxygen at both reactant and product making the equation balanced.
Answer:
No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a ... to change 1 kg of liquid water at the normal boiling point (100ºC at atmospheric pressure) to steam (water vapor).
The melting point of lead is 327.3o C. Assume the final temperature of the system is T. Then the amount of energy released by the lead as it solidifies is. ΔQ = mleadLlead = 0.09 kg*(2.45*104 J/kg) = 2205 J
Answer:
so what ever one is new here
Answer:
Electrons
Atomic number
Explanation:
The question describes a period table which is a chart of the elements.
The Periodic Table of elements shows the arrangement of elements based on their increasing atomic number.
In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number. In addition, the position of an element in the periodic table—its column, or group, and row, or period—provides useful information about how those electrons are arranged (electronic configuration) in their different shells.
It is a way to display to number of ____electrons____ for elements. This chart will show the correlation between __atomic____ number and the number of valence electrons
Answer:
C
Explanation:
This is because it is a liquid
