A sample of phosphorus tri chloride has at STP occupies a volume of 12.3L. How many miles is the sample?

Stoichiometry (8A. S, 8B. R, 8G. S, 8H. S]:Question 4 What is the mass of 1.204 x1024 particles of Li2O?

Which of the following descriptions about standard addition and internal standards are NOT correct? a) Internal standard is useful when the matrix in the unknown is complicated.

Convert 1.75 * 1024 atoms of carbon to moles of carbon.

An over-the-counter multi-vitamin has 250.0 mg tablets that are 40 % Vitamin B6 by mass. If you take 2 tablets, what mass of Vitamin B6 have you ingested?

A sample of an unknown compound was decomposed and found to be composed of 1.36 mol oxygen, 4.10 mol hydrogen, and 2.05 mol carbon. What is the empirical formula of the unknown compound?

The liquid substances mercury (density = 13.6 g/ml), water (1.00 g/ml), and cyclohexane (0.778 g/ml) do not form a solution when mixed, but separate in distinct layers. list how the liquids would position themselves in a test tube.

What element is used to make expensive forks spoons and tableware?

What is the mass number of an atom of 5 protons and 7 nuetrons

Okay so I'm trying to understand something for my CER. I did a lab on objects that have an equal mass but volume and density vary. Now I need to defend why the volume increased and the density decreased.

A flask contains 0.83mol of neon gas at a temperature of 35°C. The pressure gauge indicates 0.37atm inside the flask. What is the volume of the neon gas?