Given:
Atomic number of an atom = 14
Partial electron configuration = 1s²2s²2p⁶3s²X
To determine:
The identity of X
Explanation:
Based on the Aufbau rule, the order in which the orbitals fill up based on energetic considerations is:
1s 2s 2p 3s 3p 4s 3d 4p ....
maximum # electrons in s orbital = 2, p = 6, d = 10 and so on
Since 3p would follow the 3s orbital, in this case we will have the full configuration as:
1s²2s²2p⁶3s²3p²
Ans c) X = 3p²
The theoretical yield and percent yield of hydrogen if 0.27 g of H2 collected is calculated as follows
write the reaction equation
that is Fe + Hcl = H2 + FeCl2
calculate moles of Fe = mass/molar mass = 8.85 g/56 g/mol =0.158 moles
by use mole ratio between Fe : H2 which is 1:1 the theoretical moles of hydrogen = 0.158moles
the theoretical mass is therefore = moles x molar mass
= 0.158 mol x2g/mol =0.316 grams
% mass = actual mass/ theoretical mass x 100
= 0.27/0.316 x100 = 85.4 %
Answer:
42
Explanation:
Relative mass = number of protons + number of neutrons
Relative mass = 20 + 22
Relative mass = 42
Reduce the burning of fossil fuels by using electrical vehicles and instruments is the only solution to stop climate change.
<h3>
How climate change can be stopped?</h3>
Climate change is a process which occurs due to the release of greenhouse gases such as methane and carbondioxide gases. When fossil fuel is burn, it releases energy along with carbondioxide gas which blocks the escape of solar radiation.
This blockage leads to the warming of surface temperature. So if we switched to electrical vehicles instead of conventional vehicles, this climate change can be stopped.
So we can conclude that reduce the burning of fossil fuels by using electrical vehicles and instruments is the only solution to stop climate change.
Learn more about climate here: brainly.com/question/17922964
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