Answer:
Empirical formula = NO₂
Molecular formula = N₂O₄
Explanation:
Percentage mass of Nitrogen = 30.4 %
Percentage mass of Oxygen = 60.9 %
Mole ratio of the elements:
Nitrogen = 30.4/14 = 2.17
Oxygen = 69.9/16 = 4.37
Dividing by the smallest ratio to obtain a simple ratio
Nitrogen: 2.17/2.17 = 1
Oxygen; 4.37/2.17 = 2
Therefore, the simplest mole ratio is 1:2
Empirical formula = NO₂
Molecular formula = n(empirical formula), therefore, molecular mass = n *(empirical mass)
92.010 = n(14 + 32)
92.010 = 46n
n = 92.010/46
n = 2
Therefore, molecular formula = 2(NO₂)
Molecular formula = N₂O₄
Answer:
I believe it's either a or b but I'm pretty sure that it's a
Atomic number refers to the number of protons within the nuclei of an element's atoms (and therefore the number of electrons) while mass number refers to the number of protons and neutrons within the nucleus.
Answer:
I believe the answer is B
Explanation:
A nucleus of an atom has protons and neutrons. We know that a proton has a charge of +1 , while a neutron has no charge, or 0 . Therefore, the nucleus of an atom will always have a positive charge.
The answer is true. It is the last star.
