Answer:
New Moon
Explanation:
Spring tides occur during new moons when the Sun and the moon are aligned, Pulling together creating big tides.
We can use the ideal gas law equation for the above reaction to find the number of moles present
PV = nRT
P - pressure - 1.41 atm x 101325 Pa/atm = 142 868 Pa
V - 109 x 10⁻⁶ m³
R - 8.314 Jmol⁻¹K⁻¹
T - 398 K
substituting the values in the equation
142 868 Pa x 109 x 10⁻⁶ m³ = n x 8.314 Jmol⁻¹K⁻¹ x 398 K
n = 4.70 x 10⁻³ mol
number of moles = mass present / molar mass
molar mass = mass / number of moles
= 0.334 g/ 4.70 x 10⁻³ mol = 71.06 g/mol
halogens exist as diatomic molecules
Therefore atomic mass - 71.06 / 2 = 35.5
halogen with 35.5 g/mol is Cl
unknown halogen is Cl
Answer:
1)electrons
2)protons, neutrons
Explanation:
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If the difference in electronegativtiy for the atoms in a bond are greater than 0.4,we consider the bond polar, if the electronegativity is less than 0.4, we consider it non polar. if there are no polar bonds, the molecule is non polar.
1 mol is (always) the same number of units: 6.02 * 10^23 units.
So 0.5 moles of any gas has the same number of molecules.
Also, we know by the ideal gas laws that a give number of molecules of any gas will occupy the same volume.
Given that the three gases have the same number of atoms in the molecular fomula (2), 0.5 moles will also have the same number of atoms.
g.f.w. stands for grams formula weight and that is different for all of them, because gfw is calcualted from the atomics masses of each atom in the molecule.
Then at STP (standard temperature and pressure) conditions 0.50 moles of any of the gas:
- will contain the same number of molecules,
- will contain the same number of atoms
- will occupy the same volume.