Answer:
We know based on the charges of each ion and the fact that they must always sum to 0
Explanation:
Na only has one outer electon to give so it is always +1
Mg has two outer electrons so it always gets +2
Halogens have one "missing" electron in their outer shell so they get a -1
For NaCl (+1) + (-1) = 0
For MgI2 (+2) + 2(-1) = 0
It is B because I did it back in 1999
The answer is Hydrogen bonds
Density is a ratio between the mass and the volume of a substance.It measures how much of a substance is packed into a set volume. Density increases when a larger amount of material is packed into a smaller volume. The same is true in opposite: density decreases when a smaller amount of a substance is packed into a larger volume.
To calculate density, we will take the total given mass of the substance and divide it by the total volume of its container.
In this problem, we have a mass of 86 grams and a volume of 25cm^3.
Density= mass/volume
Substitute the given values into the formula:
Density=86 grams/25 cm^3
Density=3.44 grams/cm^3
The density of the material is 3.44 g/cm^3.
Based on the chemical equation, to balance the given equation we should use 2 as a coefficients of HCl on reacatnt side of the reaction.
<h3>What is balanced equation?</h3>
Balanced chemical equations are those equation in which each entities are present in same amount on reactant side as well as on the product side of the chemical reaction.
Given chemical reaction is:
Zn + HCl → ZnCl₂ + H₂
In the above reaction equation is not balanced as number of chlorine and hydrogen atoms are not equal on both sides, so balanced equation will be:
Zn + 2HCl → ZnCl₂ + H₂
Hence we add 2 as a coefficient of HCl to balance the equation.
To know more about balance equation, visit the below link:
brainly.com/question/15355912