Answer:
Alpha decay forms new element with two fewer protons and two fewer neutrons; Beta decay forms new element with one more proton and one fewer neutron.
Explanation:
Carbon has four valence electrons. Meaning, it has 4 electrons in it's last shell. These 4 electrons will form a covalent bond with other elements to get the full set of 8 electrons needed for it to be stable. That is why it's considered as tetravalent.
Answer:
No
Explanation:
The given equation is not balanced
Chemical equation:
KClO₄ → KCl + O₂
Given Balanced chemical equation:
KClO₄ → 2KCl + 2O₂
Correctly balanced chemical equation:
2KClO₄ → 2KCl + 4O₂
Now this equation is correctly balanced.
There are two potassium atom two chlorine atoms and eight oxygen atoms on both side of equation. So this is correctly balanced.
Coefficient with reactant and product:
KClO₄ 2
KCl 2
O₂ 4
Answer:

Explanation:
Molarity is concentration measured in moles per liters. It is the number of moles of solute per liters of solution. The formula is:

We know the solution of HCl has a molarity of 0.5 molar and there are 0.8 liters of solution.
- 1 molar (M) is equal to 1 mole per liter.
- Let's convert the molarity of 0.5 M HCl to 0.5 mol HCl per liter. This will make unit cancellation easier.
The moles of solute or HCl are unknown, so we can use x. Now, we can substitute all known values into the formula.

Since we are solving for the moles of solute (x), we must isolate the variable. It is being divided by 0.8 liters. The inverse of division is multiplication, so we multiply both sides by 0.8 L.


The units of liters (L) cancel.


This solution contains <u>0.4 moles of HCl.</u>