What is the likely chemical formula of the compound formed between zinc and phosphorus?

What is the mass percentage of C in the compound, CH4?

What is proper syntax to find the probability that a randomly selected exam will require more than 15 minutes to grade?

Which of the following is an intensive (bulk) property of matter?

The empirical formula of a compound is C7H5O2. If the molecular mass of this compound is242 amu, what is its molecular formula?

When the following equation is balanced properly with whole number coefficients, what is the coefficient in front of oxygen (O2)? C4H10 + O2  

The wavelength of a red laser pointer is 632.8 nanometers (nm). What is this wavelength in micrometers (µm)?

What is the probability that more than 4 students will arrive late in a given week?

“White gold” contains gold and a “white” metal, such as palladium. Two samples of white gold differ in the relative amounts of gold and palladium they contain, although both are uniform in composition throughout.  Which of the choices below is the best classification of “white gold”?

What is the empirical formula of a compound that contains 49.4% K, 20.3% S, and 30.3 % O by mass?