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The electron pair geometry and molecular geometry (in that order) for SCl2 is  

Write the formula for copper (II) nitrite. NOTE: Since entering answers does not allow for subscripts, the formula Cs2S is written as Cs2S.    

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.