1 mol KMnO₄ contains 4 mol O, which has a molar mass of about 15.999 g/mol. Then the mass of O in the sample is
(4 mol) (15.999 g/mol) ≈ 63.996 g
Given that the manager wants to know the type of vegetarian dishes that the people prefer, the sample that is going to provide him with the most accurate data is:
- a random group of 40 people on the street
The reason for this is because this sample has the most number and the people that are used for the sampling were chosen randomly.
A random sampling is very good because it provides an opportunity for every member of a population to be selected.
Read more on random sampling here:
brainly.com/question/24466382
If you were blacklisted during the Red Scare, you would not be able to find work in the entertainment industry.
<h3 /><h3>What was the Red Scare?</h3>
This was a time in the 1950s where people were increasingly worried that Communists had inflitrated America and were plotting a takeover.
When people were blacklisted for being involved in Communist activity, they would be unable to find employment in entertainment as people wanted to avoid their bad publicity.
Find out more on the Red Scare at brainly.com/question/3724882
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Answer:
A.
1.0 M molecular sucrose (C12H22O11)
Cos(2θ) = cos²θ - sin²θ = (1-sin²θ)-sin²θ = 1-2(7/9)^2 = -17/81