1
A student measures 8.724 g of a solid and must report it with three significant figures. What is the correctly rounded mass?
2
Convert 500.0 mi to kilometers using the conversion factor 1 mi = 1.6093 km. What is the result rounded to one decimal place?
3
Which of the following statements about the Pauli exclusion principle is correct?
4
A sample contains 2.00 g of NaCl (M = 58.44 g·mol⁻¹). How many moles are present?
5
Which element has the highest electronegativity among the following?
6
A 2.00 L container holds a gas at 298 K and 1.00 atm. Using the ideal gas law, what is the amount of substance in moles? (R = 0.0821 L·atm·K⁻¹·mol⁻¹)
7
Identify the error in the following statement: "The molar mass of carbon is 12 g·mol⁻¹, therefore 1 mol of carbon atoms weighs 12 g."
8
Which quantum numbers correspond to the last electron of an element with Z = 49?
9
A mixture contains 23.5 cm³ of gold (density = 19.3 g·cm⁻³). What is its mass in grams?
10
Which of the following best describes the trend of atomic radius across a period from left to right?
