Answer: 5.00 x 10^23 atoms
Explanation:
Based on Avogadro's law:
1 mole of any substance has 6.02 x 10^23 atoms
So, 1 mole of Iron = 6.02 x 10^23 atoms
0.83 moles of Iron = Z atoms
To get the value of Z, cross multiply:
Z atoms x 1mole = (6.02 x 10^23 x 0.83)
Z = 5.00 x 10^23 atoms
Thus, there are 5.00 x 10^23 atoms of iron.
Answer:
The density of old trunk is and it is equal to the density of metal lead.
Explanation:
Mass of the trunk , m= 222 g
Length of the cubic trunk = 2.7 cm
Volume of the cube =
Density of the truck =
The density of old trunk is and it is equal to the density of metal lead.
Answer:
CCl4
Explanation:
In CCl4, there have been 4 symmetric arrangement of bonds around the main(center) carbon atom. Every bond is polar, that you can decide by contrasting carbon's and chlorine's electronegativity. The electronegativity corresponds to how powerfully the electrons bind the molecule. Whenever the two atoms in a covalent bond have opposite electronegativity, they can transfer their electron pair in that bond to one atom, creating a polar bond.
Since the 4 chlorine atoms are symmetrically arranged, the bonds ' polarity cancels each other out, rendering them a non-polar molecule.
Answer:
No, this is false because we know about the law that says if you add two things together you are adding the masses together, 2 drops of vinegar and 2 drops of ammonia would equal four drops of solution not two
Hope this helps!!
Explanation:
<u>Answer:</u> The correct answer is isotopes generally have the same chemical properties, but often different nuclear properties.
<u>Explanation:</u>
Isotopes are defined as the chemical species of the same element which have same atomic number but differ in their mass number.
Atomic number is defined as the number of protons or electrons that are present in a neutral atom.
Atomic number = number of protons = number of electrons
Mass number is defined as the sum of number of protons and neutrons that are present in an atom.
Mass number = Number of protons + Number of neutrons
Nuclear properties of an element is determined by the number of protons and neutrons present in a nucleus.
Chemical properties of an element is determined by the number of electrons present in an atom.
Isotopes have same atomic number, this means that they have same number of protons and electrons but they differ in mass number, which means that they differ in number of neutrons.
Hence, isotopes will have same chemical properties but different nuclear properties.