Polar<span> bonds happen when two atoms form a </span>molecule<span> using a covalent </span>bond<span>. When the two atoms share electrons, there is also a change of electron density. If the electrons are not shared equally, then there will be a partial </span>ionic<span> charge. ... The greater the </span>difference<span> in these charges, the more </span>ionic<span> the </span>bond<span> will be</span>
Answer:
The answer is, in fact, Calcium Nitrate. I even looked it up to make sure, and according to PubChem, it is Calcium Nitrate. I suggest asking your teacher what this question is trying to ask because if it says it is not Calcium Nitrate, someone got it wrong.
Explanation:
The only other name I can think of, though, is Calcium Dinitrite.
Answer:
30 gallons of the first brand and 150 gallons of the second one.
Explanation:
We have two unknown quantities, and , so it is necessary to write two equations that relate that variables. First, we are going to consider that the volume is an additive property, which means that if you mix and gallons the final volume V will be:
The other equation we will write is based on a mass balance of the antifreeze. We know that the content of antifreeze in a given volume is the multiplication of that volume by the concentration, so the mass balance would be:
It means that the total of the antifreeze in the final mix (which is ) is equal to the sum of the antifreeze that was on the first brand volume (V_1*x_1) and the antifreeze that was on the second brand volume (V_2*x_2).
Now we have a two equation two unknown system, so let's solve it:
From first equation:
,
Replace on the second one.
Finally, from ,
<h2>
Answer: 1.22 × 10⁻¹ m</h2>
<h3>Explanation:</h3>
Wavelength = Speed of Light ÷ Frequency
= (2.99 × 10⁸ m/s) ÷ ( 2.45 × 10⁹ /s)
= 1.22 × 10⁻¹ m
The wavelength of a light of frequency 2.45 × 10⁹ /s is 1.22 × 10⁻¹ m.
<u>Notes:</u>
Hz ≡ /s