Answer: Option (3) is the correct answer.
Explanation:
A covalent bond is defined as the bond formed by sharing of electrons. A single covalent bond involves only two electrons.
When four electrons are shared unequally between two atoms then it results in the formation of a double bond.
And, when six electrons are shared unequally then it results in the formation of a triple bond.
It is true that a single covalent bond is weaker than a double covalent bond. Also, a triple covalent bond is stronger than a single covalent bond.
Therefore, we can conclude that the statement four electrons are shared unequally between two different atoms, is INCORRECT concerning a single bond that is polar.
1) Chemical equation
<span>4C3H5(NO3)3(l) 12CO2(g) + 6N2(g) + 10H2O(g) + O2(g)

2) Molar ratios
4 mol C3H5(NO3)3 : 10 mol H2O
3) Convert grams of water into number of moles:
numer of moles = mass in grams / molar mass = 120 g / 18.0158 g/mol =
number of moles = 6.66 moles H2O.
4) use proportion and solve for x
4 mol C3H5(NO3)3 / 10 mol H2O = x / 6.66 mol H2O
=> x = 6.66 mol H2O * 4 mol C3H5(NO3)3 / 10 mol H2O = 2.66 mol C3H5(NO3)3
5) Convert </span><span>2.66 mol C3H5(NO3)3 into grams
mass in grams = molar mass * number of moles = 227.0995 g * 2.66 mol = 605.07 g
Answer: 605.07 g</span>
Aluminum can preserve food and drinks longer than iron can. If oxygen combines with the iron the iron will rust and the food or drink inside will not be good to eat anymore and you will have to waste it.
Density of copper can be calculated using the following formula:

Here, m is mass and V is volume, thus, to calculate density first calculate mass and volume of copper.
In FCC, number of atoms in a unit cell are 4, atomic mass of Cu is 63.546 g/mol and number of atoms in 1 mole is
.
Mass of Cu will be:

Now, volume can be calculate as:

Here, a is edge length.
First convert edge length from pm to cm

Thus,

Putting the value,

Now, from mass and volume density can be calculated as follows:

Therefore, density of copper will be
.
The exact answer is 511.219514