How many moles of sodium (Na) are there in a 50.0 gram sample of the metal?   Group of answer choices   1.15 x 103 moles Na 0.230 moles Na 2.17 moles Na 1.09 moles Na 0.460 moles Na

Question 1 options: A. The Mole We will use the analogy of an elephant and its body parts to explore the concept of moles of compounds or elements. The elephant and the carbon tetrachloride, CCl4 molecule are the test cases. One elephant has one trunk and four legs One carbon tetrachloride molecule, CCl4, contains one carbon atom and four chlorine atoms 1 amu = 1.6606 x 10-24 g 1 dozen = 12 items 1 mole = 6.022 x 1023 items = Avogadro's Number Critical Thinking Questions: (Give your answers in terms of a number such as 17 or 3.25 x 1015 trunks)   1. How many trunks are found in one dozen elephants?

Q2

How many atoms of lithium are in 18.7 g? O none of the above O 2.70 x 1024 O 3.11 x 1024 O 2.14 x 1024 O 1.62 x 1024

How many moles are there in 16.64 grams of calcium hydroxide, Ca(OH)2? Round your answer to the nearest hundredth. Enter a number.

Calculate the number of moles containing each of the following. Express your answer with the appropriate units. 1.15×1022 atoms of cobalt, Co 2.65×1023 molecules of carbon dioxide, CO2 5.60×10 24 formula units of cobalt(II) carbonate, CoCO3

How many grams of calcium nitrate are contained in 2.52 mol of Ca(NO3)2? Group of answer choices 69.1 g 414 g 257 g 74.1 g How many grams of oxygen are contained in 0.500 mol of Na2SO4? Group of answer choices 64.0 g 16.0 g none of these 32.0 g

I'm taking a practice test and I'm having some trouble and was hoping you could help.  This is not graded I just need help See attached:

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