Answer:
8 oxygen. 9 flourine. 10. Neon. 5 Boron
Answer:
One mole of U238 ( 6.022 X 10^23 atoms) is 238 grams; one mole of U235 is 235 grams. The difference in molecular weight between a mole of U235 and U238 is 3 grams, the secret to enriching uranium.
Explanation:
Answer:
82
Explanation:
Atomic number of the isotope is 26 and it has a mass number of 56
X = ⁵⁶₂₆Fe
The three main subatomic particles in an atom are
1. Proton
2. Neutron
3. Electron
The number of protons and electrons are usually equal so as to maintain electrical neutrality in the atom except in cases where it's a charged particles hence the number of proton and electrons will differ.
In this case, the atomic number is 26 and atomic numbers are also known as the number of protons (positively charged particle).
Proton = 26
Electrons = 26 (since it's a naturally charged particle)
Neutron = ?
Mass number = sum of proton and neutrons. This variation in the mass number usually leads to isotopes of an atom and this is mainly caused by variation in the number of neutrons eg. Carbon-12 and Carbon-13 have different number of neutrons.
Mass number = protons + neutrons
Neutrons = mass number - protons
Neutrons = 56 - 26
Neutrons = 30
Subatomic particles present are
Protons = 26
Electrons = 26
Neutrons = 30
Total number = (26 + 26 + 30) = 82
The total number of subatomic particles is 82.
Answer:
The answer to your question is letter B. Phosphoric acid
Explanation:
A. water is not the right answer because it has a density of 1 g/ml and water is a liquid not a solid.
B. phosphoric acid is the right answer because phosphoric acid is a solid and all solids have a density higher than water (1 g/ml)
C. sodium hydroxide could be the correct answer but it is not because the crystals of sodium hydroxide are more colorless than white.
Using the
V1/T1=V2/T2
where
T1=50C= 323.15K
T2= -5C=268.15 K
V2= 212m^3
substitute the given values, we will get the initial volume
V1=V2T1/T2
V1= 255.48m^3
The initial volume is 255.48m^3