Question

what is the best tool for mixing liquids when heat is involved and you want to control fumes coming from the liquid? beaker erlenmeyer flask graduated cylinder volumetric flask what is the total magnification of a microscope with a 10x eyepiece and 20x objective lens? 10x 20x 2x 200x

Explanation:

1. For the first question, beakers are open - top and not ideal for fume control. Graduated cylinders are mainly for measuring volume, not mixing with fume control. Volumetric flasks are for precise volume measurements, not for mixing with heat and fume control. Erlenmeyer flasks can be used for mixing, can be heated (with appropriate precautions), and can be fitted with a stopper or connected to a fume - hood for fume control.
2. For the second question, the total magnification of a microscope is the product of the magnification of the eyepiece and the objective lens. So, if the eyepiece is 10X and the objective lens is 20X, the total magnification is $10\times20 = 200$X.

Answer:

1. Erlenmeyer Flask
2. 200X