How many moles are in 41.52g of sand

The relative atomic mass of Chlorine is 35.45. Calculate the percentage abundance of the two isotopes of Chlorine, 35Cl and 37Cl in a sample of chlorine gas. (Total 2 marks)

If 1.0 a of current are passing through a wire how many electrons pass through a cross-section of the wire in 1.0 hours?

In water, HCN is a weak acid with pKa = 9.6. a. Calculate the the Ka and the [H+] in a 0.15 M solution of HCN. b.

Compare and contrast an electromagnet and a permanent magnet.

At 7.0c the volume of a gas is 49 mL at the same pressure it's volume is 74Ml at what temperature

1. Valcouroceras is a New York State index fossil. Which mountain-building event occurred in New York State during the time when Valcouroceras was living in oceans covering parts of New York State? 1. Alleghenian orogeny 2. Acadian orogeny 3.

For the following reaction 2 R (g) - -> Q (g) if the equilibrium concentration of R is 0.776 M and that of Q is 1.22 M at 25? C, what is the value of the equilibrium constant at this temperature? a. 0.521 b. 0.494 c. 2.03 d. 1.57

What is the lethal dose of chocolate

What is characteristics of the 6kingdoms

What is the correct formula for sodium nitrate