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yulyashka [42]
2 years ago
8

What is the angle, in degrees, when the coordinate is

t%7B2%7D%20%2F2%29" id="TexFormula1" title="(-\sqrt{2} /2), \sqrt{2} /2)" alt="(-\sqrt{2} /2), \sqrt{2} /2)" align="absmiddle" class="latex-formula"> ? Pls help thanks
Mathematics
1 answer:
Juliette [100K]2 years ago
8 0

Answer:

135°

Step-by-step explanation:

seg AB=seg OB

tan ∠AOB = 1

∠AOB = 45°

∠AOC = 135°

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Answer:

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Step-by-step explanation:

Here's my work:

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The first thing you have to do is convert the 500 g of Cl2 into moles.  So you get the mass of Cl which is 35.5, but Cl is diatomic by itself so you multiply 35.5 x 2 and get 71.   now on the third column you are comparing the mol ratios of the equation.  The equation is 2Na + Cl2 ---> 2NaCl, so you see that there is no coefficient in front of Cl2 so that means there is 1 mol, and then you see that in the product there is a  coefficient of 2 in front of NaCl so that means there is 2 moles.  Then finally you have to convert the moles backs into grams where you just add the masses of Na and Cl .  You multiply across the top  and then divide that number by the bottom row.

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2 years ago
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