True or false? the formula of a compound that expresses the smallest whole-number ratio of the atoms present is called the empirical formula.

Na+l2 Nal balance chemical equation

Which electron configuration represents an excited state for a potassium atom? (1) 2-8-7-1 (3) 2-8-8-1 (2) 2-8-7-2 (4) 2-8-8-2

The main reasons why h2co has a higher vapor pressure at a given temperature when compared to ch3oh is that h2co

Why is the end of the headphones that plugs into the device not coated in plastic? A) The metal costs less. B) The plastic would melt. C) The plastic would break too easily. D) The metal is a better conductor of electricity.

If a dolphin is producing a vocalization with a frequency of 35 Hz, traveling at 1470 m/s, what is the wavelength of the sound?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.

The number of grams present in 1.35 mol of Fe is

Which can associate a suspect's gun with a crime?