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Levart [38]
4 years ago
13

Cos(A)+cos(2A)+cos(3A)=0 is not an identity​

Chemistry
1 answer:
guajiro [1.7K]4 years ago
3 0

Answer:

this is the required answer look it once

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How does the surface area influence the sliding force of friction WILL MARK BRAINLIEST
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The force due to friction is generally independent of the contact area between the two surfaces. This implies regardless of whether you have two overwhelming objects of a similar mass, where one is half as long and twice as high as the other one, despite everything they experience the equivalent frictional power when you drag them over the ground.

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4 years ago
What is the true, molecular formula of a compound with the empirical formula C13H19O2 and molar mass of 414.64g?
posledela

C13H19O2 = (12 * 13) + (1 *19) + (16 *2) = 156 + 19 + 32 = 207. 
The formula is n = molar mass of molecular formular / molar mass of empirical formular. MM of molecular formula = 414.7 and of empirical formula =207  
So n = 414.7 / 207 = 2. 
So the true molecular formula is 2(C13H19O9) = C26H38O18.
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