Describe how rows and columns in the modern periodic table are organized

5. You have 100 kg of gas of the following composition: CH4 - 30% H2 - 10% N2 - 60% What is the average molecular weight of this gas?

Compare the electrical conductivity, solubility and volatility between HCl and NaCl.

How many total atoms are in 0.720 g of p2o5

What is the density of melted iron?

Water decomposes into hydrogen and oxygen when an electric current is applied. How many grams of water must decompose to produce 2 grams of hydrogen and 16 grams of oxygen?

One mole of calcium ions has the same number of representative particles as which of the following? one mole of calcium nuclei one mole of calcium atoms 6.02 x 1023 calcium ions All of these are correct.

How is chemical symbol and chemical formula difference?

Why is a cis-1,3-disubstituted cyclohexane more stable thanits trans isomer?

How many grams of aluminum will react with 3.4 moles of chlorine

What chemical reaction produces water via synthesis reaction