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What ratio must be combined with 5:4 to yield 2:1? Select an answer below and show all your work on your paper

What ratio do you get when you combine the ratio for a P5 and a P4? Select an answer below and show all your work on your paper

Find z such that 24.5% of the standard normal curve lies between −z and z.

In the Lewis structure of HCO3-, the formal charge on H is __________ and the formal charge on C is __________.

Should a learner be ready to take the actual exam yet, even before taking this Practice Exam?

Triethanolamine is used to trap carbon dioxide that is emitted from power plants. When it is dissolved in water it undergoes a Brønsted acid/base reaction to reach equilibrium, as shown in the image. The amine reacts with water to give an ammonium cation and the hydroxide anion. An equilibrium is established and so the ammonium cation and the hydroxide anion also react to give the amine and water.Identify the acid and the base on both sides of the Brønsted acid/base equilibrium.

Is the following a geometric sequence? If so, find the common ratio, r.  5, 10, 15, 20 … 

When you eat food at room temperature, which of the provided options describes the largest change in your internal energy?

Find the probability that the standardized normal variable z lies in the interval -z0.8 < z < z0.8 if the confidence level is 80° and the critical value is z0.8.

What are the notes of an B MINOR scale?  (use “#” for sharp and “b” for flat) B, [note1], [note2], [note3], [note4], [note5], [note6], B