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Calculate the density of a piece of plastic that weighs 45.32 g and measures 4.51 cm x 6.45 cm x 2.31 cm. Please show your work with your answer.  You can use the equation editor  above if needed.

Write the following in standard scientific notation, keeping the proper number of significant figures: 0.000 000 000 290 Gg

Determine the molar mass of Al(NO3)3 Enter the answer showing 2 decimal places.

Write the shorthand electron configuration (using noble gas core) for the element tin, Sn: Use the T2 function in the tool bar to show superscripts.

If a rectangular block of lead has the measurements of 5.78 cm long, 3.55 cm wide, and 2.22 cm thick.  If lead has a density of 11.3 g/cm3, then determine the mass of the lead block.   Show your math setup with answer.  An answer only will NOT receive full credit. You may choose to use the equation editor (  ).  Click on the three vertical dots to find it in the tool bar. Express answer using significant figure rules.

Select ALL the empirical formulas from the list:

How many protons, neutrons, and electrons are in an atom of bismuth-209?

Write the complete electron configuration for the element chromium, Cr: Use the T2 function in the tool bar to show superscripts.

A mixture of gases contains CO2 (at 0.642 atm), SO2 (at 88 mm Hg), and N2 (at 234 torr).  What is the total pressure of the gas mixture in atmospheres?

Write the name for H2SO4(aq) in the blank.