Answer:
The octet rule means that atoms need a total of 8 valence electrons to fill their valence shell. Hydrogen only needs two to fill its valence shell.
Explanation:
All atoms except for hydrogen can hold a total of 8 valence electrons in their outer energy levels (2 in the s level, 6 in the p level). Hydrogen only has two electrons total, so it does not require more than the s level and two electrons to have a full valence.
Answer:
Volume of heptane in cylinder = 51.2mL
Volume of water = 33mL
Explanation:
Density(g/mL) = mass/ Volume
》Volume = mass/ Density
Please prompt me if I'm wrong in my workings. Hope this helped.
Answer:Chlorine gas bubbles out of the melt above the anode. Sodium ions migrate to the cathode, where electrons enter the melt and are reduced to sodium metal
Explanation:
Answer:
2.8212 g
Explanation:
The reaction of copper sulfate with zinc is shown below as:
Given that :
Amount of zinc = 2.9 g
Molar mass of zinc = 65.38 g/mol
The formula for the calculation of moles is shown below:
Thus, molesare:
From the reaction,
1 mole of zinc on reaction forms 1 mole of copper
Thus,
0.0444 moles of zinc on reaction forms 0.0444 mole of copper
Mass of copper = moles×Molar mass
Molar mass of copper = 63.54 g/mol
<u>Mass of copper = 0.0444 ×63.54 g = 2.8212 g</u>
