You’ll need to be sure to count all the atoms in each side of the chemical equation.
It would repel some of the negatively charged electrons of the wall so the answer would be C. The wall and the ballon repel each other
Answer:
A compound by definition contains at least 2 different kinds of atoms. A Hydrogen molecule contains only one kind of atom, 2 hydrogen atoms
Answer: Mass of silver deposited at the cathode is 37.1g
Explanation: According to Faraday Law of Electrolysis, the mass of substance deposited at the electrode (cathode or anode) is directly proportional to quantity of electricity passed through the electrolyte
Faraday has found that to liberate one gm eq. of substance from an electrolyte, 96500C of electricity is required.
+e− ==> Ag(s)
Given that
Current (I) = 8.5A
Time (t) = 65 *60 = 3900s
Quantity of electricity passed = 8.5*3900 =33150C
Molar mass of Ag= 108g
96500C will liberate 108g
33150C will liberate Xg
Xg= (108*33150)/96500
=37.1g
Therefore the mass of Ag deposited at the cathode is 37.1g.
Answer: 7.56 moles
Explanation:
C3H8 is the chemical formula for propane, the third member of the alkane family.
Recall that based on Avogadro's number, 1 mole of any substance has 6.02 x 10^23 atoms
So 1 mole of C3H8 = 6.02 x 10^23 atoms
Z moles of C3H8 = 4.55 x 10^24 atoms
To get the value of Z, we cross multiply:
1 x 4.55 x 10^24 atoms = Z moles x (6.02 x 10^23 atoms)
4.55 x 10^24 atoms = Z moles x (6.02 x 10^23 atoms)
To get the value of Z divide both sides by 6.02 x 10^23 atoms
Z moles =4.55 x 10^24 atoms ➗ 6.02 x 10*23 atoms
Hence, Z = 7.56 moles
Thus, the number of propane, C3H8 is 7.56 moles
