<h3>
Answer:</h3>
#a.2H2 + O2 → 2H2O
#b. 2S + 3O2 → 2SO3
#d. 2K + 2H2O → H2 + 2KOH
<h3>
Explanation:</h3>
- A balanced chemical equation is one that has equal number of atoms of each element on both sides of the equation.
In this case;
- 2H2 + O2 → 2H2O - is balanced since it has, 4 hydrogen atoms and 2 oxygen atoms on either sides of the equation.
- 2S + 3O2 → 2SO3, is balanced. It has 2 sulfur atoms and 6 oxygen atoms on both side of the equation.
- 2K + 2H2O → H2 + 2KOH, is balanced , 2 potassium atoms, 4 hydrogen atoms and 2 oxygen atoms on both side of the equation.
- On the other hand, the equations that are not balanced include;
- Li + Cl2 → LiCl
- 2Fe + Cu(NO3)2 → 2Cu + Fe(NO3)2
This is because the number of atoms of each element is not equal on both side of the equation/
sure its b but im preatty sur dont spell check me plz
The correct answer is - False.
The funding for the preservation of the forests should be equally distributed for all the forests on the planet. The tropical rain forests are the thickest, the ones that have the largest biodiversity, and they are the ones that produce the highest levels of oxygen, but that doesn't mean that they are the only ones that need protection. The largest forests in the world are actually not the tropical rain forests, but instead it is the taiga, stretching from Scandinavia, throughout all the length of Russia, and throughout all the length of Canada. The mid latitudes are covered with deciduous forests, and they play a crucial role in this parts of the world, both in cleaning the air, providing oxygen, as well as supporting the ecosystems.
Aluminum's outer electron in 3p-orbital is slightly further from the nucleus and protected by 3s-orbital. This causes it to need less energy. Magnesium's outer electron is closer and not protected by an outer orbital.
Hope This Helps and Ged Bless!
Answer:
0.44g
Explanation:
Given parameters:
Mass of magnesium hydroxide = 0.645g
Solution
The balanced reaction equation is shown below:
Mg(OH)₂ → MgO + H₂O
From the equation above, we see that the number of atoms are conserved.
To find the mass of magnesium oxide produced, we find the number moles of the decomposed magnesium hydroxide first:
Molar mass of Mg(OH)₂ = 24 + 2(16+1) = 58g/mol
Number of moles of Mg(OH)₂ = 
= 
= 0.011mole
Now, from the balanced equaiton, we know that:
1 mole of Mg(OH)₂ produces 1 mole of MgO
Therefore, 0.011mole of Mg(OH)₂ will produce 0.011mole of MgO
so mass of MgO = number of moles of MgO x molar mass of MgO
Molar mass of MgO = 24 + 16 = 40g/mol
mass of MgO = 0.011 x 40 = 0.44g
