Calculate:  (-4.372 +23) / (-15)  If you use your personal scientific calculator, show both its front and back sides to the camera.  There is only one correct answer.  One of the routine calculation in CHM2045 is multiple-step addition/subtraction and multiplication/division.  If you are graded wrong for the first attempt, retake this quiz. You have unlimited attempts.  Note: the negative sign is not necessarily the minus sign on your calculator. 

Which of the following is the Lewis structure of N ?

Elements in group 7A are considered _____________.

The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104 carats (1 carat = 200 mg). How many carbon atoms were present in the stone?

Convert 38.50 °C to the SI unit for temperature.

Determin the mass of 12.6 mol ethane, C2H6

What is the electron geometry and hybridization of the carbon atoms in H2C=CH2?

An tentative explanation for the collection of observations is considered a _____.

Find the number of valence electrons for ICl3.

What precipitate forms when mixing lead(II) nitrate Pb(NO3)2 and sodium iodide (NaI)?