1) has 4 sig figs(0s between 2 significant digits are important)
2) has 3 sig figs (the trailing 0s aren’t significant)
3) has 2 sig figs (the trailing 0s aren’t significant)
Since Na has a 1+ charge and O has a -2 charge, by reversing the charges and placing them as subscripts for the other atoms the formula is Na2O1 or simply Na2O.
The zone and its characteristics include the following:
- Subpolar low: Lies along the polar jetstream.
- Horse latitudes: The trade winds and westerlies originate here.
- Doldrums: Heavy precipitation, little wind.
<h3>What is Horse latitude zone?</h3>
This is referred to regions which is located at about 30 degrees north and south of the equator and forms the basis of westerlies.
The other zones such as doldrums are also found at the equator with their respective features and can be seen above. This therefore makes it the most appropriate choice.
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from an external source of power
Explanation:
The energy needed for nuclear fusion comes from an external source of power.
Nuclear fusion is the combination of small sized atomic nuclei to form larger ones.
The reaction releases a huge amount of energy but also requires a large activation energy to start up.
- The energy input require to drive two nuclei into fusion comes from an external source.
- Nuclear fusion has a high activation energy which serves as the energy barrier for this reaction to take place.
- The energy comes from the surrounding and once initiated, spontaneous chain reactions are set up.
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Answer:
The limiting reactant is the K
Explanation:
This is the reaction:
2 K + F₂ → 2KF
2 moles of potassium react with 1 mol of fluorine
Let's determine the moles:
6.02x10²³ molecules are contained in 1 mol
10 molecules are contained in (10 . 1) / NA = 1.66x10⁻²³ moles
For 1 mol of flourine, we need 2 moles of K
If we have 1.66x10⁻²³ moles of Fl₂, we will need the double of K
For 2 moles of K, we need 1 mol of Fl₂
If we have 1.66x10⁻²³ moles of K, we will need the half of Fl₂
Then, the limiting reactant is the K
