Analytical chemists can detect very small amounts of amoin acids, down to 3x10^-21 mol. how many molecules of an amino acid (mr=200) would this be?

The layering of eroded sediments is called: 1. limestone formation 2. mechanical weathering 3. deposition 4. the rock cycle

Why might a molecule be nonpolar even if it's bonds are all polar?

Nitroglycerin, C3H5N3O9, is an unstable compound that decomposes rapidly upon ignition or impact. Below is the thermochemical equation for nitroglycerin: 4 3539 () → 12 2 () + 10 2 () + 6 2 () + 13 2 () ∆ =

In a concentration calculation, if we are given the solute measurement in grams, and the volume of solution in liters, what do we need to do first in order to find the molarity? A. Find the mass of the solution. B.

What is the best way to transfer solid chemicals into a beaker? A.) Pour the solid from the container to the beaker B.) Use a finger to scope the chemical into the beaker C.) Use a scoop or spatula to transfer the chemical D.

Round the following number to three significant figures: 156.5021 L

Select two options from the following list that qualify as types of pure substances. a substance an atom an element a particle matter a compound

If a human cell were to increase the amount of cholesterol embedded within its plasma membrane, which of the following would most likely happen

Which of these do scientists use to study the world around them? 1. Hypothesis 2. Inductive reasoning 3. Scientific method 4. Deductive reasoning

Calculate the mass of nickel metal which will react with 25mL of 0.15mol/L ( hydrochloric acid to produce nickel (II) chloride. 0.110625g