Answer:
D.) 429.73 grams
Explanation:
number of moles x molar mass= mass in grams
3.62 x 118.71= 429.73 grams
B = 0.075 N/amp*m
V = 4.20 m/s
EMF = 0.88 Volts
L = ?
Formula = EMF = L x B x V
Since we have EMF and we’re looking for L, the formula will
now be:
L = EMF x B x V
Solution:
= 0.88 x 0.075 x 4.2
= 2.8
The length of the wire in the magnetic field is 2.8m
The answer is letter B.
A carbon 14 atom would have two more neutrons than a carbon 12 atom but they would both still have 6 protons
Answer:
0.075 is the mole fraction for HCl
Explanation:
Mole fraction = Moles of solute or solvent / Total moles
Total moles = moles of solute + moles of solvent
In this solution:
HCl is the solute
H₂O is the solvent
4.50 m means molal, 4.50 moles of HCl in 1kg of water.
Let's determine the moles of water
1000 g . 1mol/18 g = 55.5 moles
Total moles = 4.50 + 55.5 = 60.05 moles
Mole fraction of HCl = 4.50 / 60.05 → 0.075
Justification for your answer
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Chlorine is less reactive than fluorine because the outer electrons in a chlorine atom are further from the nucleus than the outer electrons in a fluorine atom. It is harder for a chlorine atom to gain an electron than it is for a fluorine atom.
There are three things to consider every single time relative reactivity is unknown; atomic radius, shielding, and number of electrons. The reactivity is the halogens ability to gain an electron, so number of electrons already in the atom plays a vital role. Chlorine has more electrons so repels a reacting electron with greater force than fluorine, making it less likely to react.
Fluorine also has fewer electron shells than chlorine, so there are fewer electrons between the positive nucleus and the reacting electron to essentiallly block, or weaken, the electromagnetic attraction. This is shielding. Lastly, fluorine is much smaller molecule than chlorine, and the shorter distance, or radius, between the nucleus and the electron again makes it more likely to attract the electron and react to gain a noble gas configuration.
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