Perform each of the following calculations.  You must show your work to receive credit and must must round your answer to the correct number of significant figures. 1. Determine the number of atoms in 4.67 mol Zn. 2. Given 7.65 mol AgNO3, determine the number of formula units. 3. Calculate the number of molecules in 11.34 mol H2O.

please Answer this question in the same format thats in the picture below on paper, answer correctly.   Question: Calculate the number of moles in: 13.5 g magnesium nitrate  [Mg(NO3)2]

MOLES/MOLECULES T04/S02 If a sample of B10H10Br4 is found to contain 1.20 · 1019B atoms how many moles of Br atoms are present? Express your answer in scientific notation. Molar Mass (g/mol) B10H10Br4 B atom H atom Br atom 437.81 10.811 х 10 1.0080 79.904 Avogadro's No. (mol¯1) 6.022x1023

What is the formula for copper(II) phosphate? Capitalization and punctuation count. formula:   How many atoms of phosphorus are in 5.70 mol of copper(II) phosphate? number of P atoms =

Complete each row with proper significant figures Substance  Molar mass, g/mol Mass in grams Number of moles Count of formula units BaBr2 297.14 2.40     P2S5 444.56   0.034   Ni3(PO4)2 366.02     5.5x1025 C6H5OH 94.11 10

1. Calculate the Molar Mass (in grams per mole) of: then calculate the number of atoms (or molecules) given moles of moles given molecules. Formula 0₂ HCIO3 Ag₂SO4 C12H22O11 Barium nitrate Molar Mass 16.0 x 2 = 32.0 g/mole moles Given 0.50 mole 1.00 mole 2.50 moles 0.10 moles Molecules .50 x NA 3.01 x 1023 molecules = 1.51 x 1023 molecules

39. Convert 2.001x102 formula units of Ba3(PO4)2 to mass, in grams, of Ba3(PO.)2. Mass of Ba3(P04)2:

S + 6 HNO3 --> H₂SO4 + 6 NO2 + 2H₂O In the above equation how many grams of water can be made when 2 grams of HNO3 are consumed? Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.: Molar Element Mass Hydrogen 1 Nitrogen 14 Sulfur 32 Oxygen 16

Find the mass of 2.6 moles of lithium bromide? Enter the numbers to the nearest hundredths place. Use the molar mass conversion factor.

Can you help me to write the label of the units for the moles, molar mass, molecules, and grams?