Answer:
chemical bond
Explanation:
because this is the only bond used in chemical reactions just like molecules of atoms are combined by this bond
Answer: protons are located in the nucleus and have a positive charge. neutrons are also located in the nucleus and have a neutral charge. electrons are located in the electron cloud and have a negative charge. the electron cloud surrounds the nucleus in an atom.
Explanation:
Answer: A
Explanation:
An acid is a substance that dissolves in water to produce proton (H +), which then combines with Water molecule (H2O) to give Hydroxonium ion (H3O +).
Acid also have a pH value below 7 on the pH scale.
Known :
V1 = 300 mL
M1 = 0.75 M
M2 = 0.25 M
Solution :
M1 • V1 = M2 • V2
(0.75 M) • (300 mL) = (0.25 M) V2
V2 = 900 mL
Water add to this solution is :
∆V = V2 - V1
∆V = 900 - 300
∆V = 600 mL
To begin with, the equation given is not correct.
Correct equation is : CaCO3 + HCl ---> CaCl2 + H2O + CO2
It's CaCl2 not CaCl because Ca has a valency of 2
LHS RHS
CaCO3 + HCl ---> CaCl2 + H2O + CO2
First of all, to balance the equation you must look at the number of atoms on each side of the equation.
we have 2 H on the RHS and 1 H on the LHS. So, we put a 2 on the LHS
CaCO3 + 2HCl ---> CaCl2 + H2O + CO2
Check for the LHS: 1 Ca, 1 C, 3 O, 2 H & 2 Cl on the LHS
Now check for the RHS: 1 Ca, 2 Cl, 2 H, 1 C & 3 O
Hope it helped!
