Answer:
, 0.533 L
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

According to avogadro's law, 1 mole of every substance occupies 22.4 L of volume at STP.
Number of moles =
moles of calcium carbonate = 
As 1 mole of calcium carbonate produces = 22.4 L of carbon dioxide at STP
Thus 0.0238 moles of calcium carbonate produces =
of carbon dioxide at STP
Answer:
ΔH°f(C₈H₁₈(g)) = -210.9 kJ/mol
Explanation:
Let's consider the combustion of C₈H₁₈.
C₈H₁₈(g) + 25/2 O₂(g) ⟶ 8 CO₂(g) + 9 H₂O(g) ΔH°rxn = − 5113.3 kJ
We can calculate the standard enthalpy of formation of C₈H₁₈(g) using the following expression.
ΔH°rxn = 8 mol × ΔH°f(CO₂(g)) + 9 mol × ΔH°f(H₂O(g)) - 1 mol × ΔH°f(C₈H₁₈(g)) - 25/2 mol × ΔH°f(O₂(g))
1 mol × ΔH°f(C₈H₁₈(g)) = 8 mol × ΔH°f(CO₂(g)) + 9 mol × ΔH°f(H₂O(g)) - 25/2 mol × ΔH°f(O₂(g)) - ΔH°rxn
1 mol × ΔH°f(C₈H₁₈(g)) = 8 mol × (-393.5 kJ/mol) + 9 mol × (-241.8 kJ/mol) - 25/2 mol × 0 kJ/mol - (− 5113.3 kJ)
ΔH°f(C₈H₁₈(g)) = -210.9 kJ/mol
Here are two examples of strong nuclear force !
Protons and nucleons
I hope that's help !
Answer:
Curbing global carbon dioxide emissions has been a challenge, primarily because they are being driven higher by countries with low per capita emissions.
Explanation:
"just trust me bro"
The balanced chemical equation when sodium and oxygen react is as below
4 Na + O₂ → 2 Na₂O
<em><u> Explanation</u></em>
From equation above 4 moles of sodium (Na) react with 1 mole of oxygen (O₂) to produce sodium oxide ( Na₂O)
Since there is equal number number of atoms in side of reactants and in the side of product the equation is balanced.
For example there is 4 atoms of Na in side of reactant and 4 in side of product.