<h3>
Answer:</h3>
28.52 seconds
<h3>
Explanation:</h3>
Initial number of atoms of Nitrogen 12,000 atoms
Half-life = 7.13
Number of atoms after decay = 750 atoms
We are required to determine the time taken for the decay.
Note that half life is the time taken for a radioactive isotope to decay to a half of its original amount.
Using the formula;
Remaining amount = Initial amount × (1/2)^n , where n is the number of half lives
In our case;
750 atoms = 12,000 atoms × (1/2)^n
0.0625 = 0.5^n
n = log 0.0625 ÷ log 0.5
n = 4
But, 1 half life =7.13 seconds
Therefore;
Time taken = 7.13 seconds × 4
= 28.52 seconds
Therefore, the time taken for 12,000 atoms of nitrogen to decay to 750 atoms is 28.52 seconds
Below is the list of both Natural and Synthetic compounds containing Carbon.
Natural Compounds Containing Carbon:
1) Food:
Carbohydrates, Proteins, Lipids, Fibers
2) Clothing:
Silk, Wool, Cotton
3) Transportation:
Coal, Natural Gas, Petroleum
4) Wood:
Building, Furniture
Synthetic Compounds Containing Carbon:
1) Clothing:
Nylon, Polyester,
2) Transportation:
Petrol, Diesel, Jet Fuels
3) Building:
High Density Polyethylene, Polyvinyl Chloride
4) Home Appliances:
Teflon in non-stick Pans, polyethylene terephthalate bottles
The answer is atomic radii; the size or radii of an atom increases from left to right, versus the ionization energies and electronegativities of atoms which increase from right to left.
Answer:
Pentacarbon heptasilicide.
Explanation:
In order to name the following compound, we need to identify whether it is molecular or ionic.
Molecular compounds consist of non-metal atoms, while ionic compounds would have metal cations in their composition.
In the given compound, 
, we have two non-metals, carbon and silicon, meaning we should follow the molecular compound naming rules. The rules involve using prefixes to state the number of individual atoms.
The two prefixes required here are 'penta' for 'five' to indicate 5 carbon atoms present and 'hepta' for 'seven' to indicate 7 silicon atoms present.
The first part of the name would be pentacarbon (notice that the standard name for the first element is used). The second part would be heptasilicide (notice that the second atom would have an ending of -ide followed by the standard beginning of silicon).
Answer:
Energy transfers to the metal from the water and calorimeter until they are all at room temperature.
Explanation:
i hope this helps
