Approximately how many particles are in a mole?

If you have a dot diagram with 8 dots (4 pairs) what does that tell you about the element

What mass of pcl5 will be produced from the given masses of 26.0 g of p4 and 50.0 g of cl2?

A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely reason for this? The Bunsen burner was not properly adjusted. The test tube holder was used to hold the copper wire.

Quinine in a 1.664-g antimalarial tablet was dissolved in sufficient 0.10 M HCl to give 500 mL of solution. A 15.00-mL aliquot was then diluted to 100.0 mL with the acid. The fluorescence intensity for the diluted sample at 347.

Why is cng preferred over petrol or diesel?

If there is a loss of 5.63 x 10 - 7 kg of mass in a nuclear reaction, how many joules of energy would be released? Recall that C equals 3 times 108 m / s.

Why is it important that scientific knowledge changes?

How many formula units are there in 2.3g of NH4SO2

In a cooking context, which of the following materials is the best heat conductor? A. Any dense liquid B. Iron C. Gas D. Glass

When you open a bottle of soda, bubbles of carbon dioxide start appearing. Is this a chemical or physical change and why?