(Solved): 1) How many grams of MgBr2 are in 7.27 x 1022 molecules of magnesium bromide (Mg ...

1) How many grams of MgBr₂ are in 7.27 x 10²² molecules of magnesium bromide (MgBr₂)?

Mg = 24.01 g/mol

Br =  79.90 g/mol

Additional Information:

• If needed, use the periodic chart values from the printable Periodic chart provided with this course.
• If needed use 6.022 x 10²³ for Avogadro's number.

Format your answer:

• With three significant figures
• Include the correct unit.

Enter your answer in decimal form with 3 sig figs. Use the proper abbreviation for the units.

2) How many grams of chlorine atoms are present in a 3.73 g sample of barium chloride (BaCl₂)?

Enter your answer in decimal form with the correct number of sig figs. Use the proper abbreviation for the units.

3) Selenium dichloride, SeCl₂, has a molar mass of 149.86 g/mol.  What is the mass in grams of 0.555 moles of SeCl₂? Use the common abbreviation for the units.