General Chemistry Answers

How many mL of hydrogen peroxide are needed to make an 11.3% solution by volume of hydrogen peroxide if you want to make 689 mL of solution?

You want to create a 0.25 M Sodium Bicarbonate solution. You weigh 5.00 grams of Sodium Bicarbonate. How much water is needed?

Rank the following compounds from weakest to strongest intermolecular forces. Justify your answer.

1. a. H₂S b. I₂ c. N₂ d. H₂O

2. a. H₂Se b. H₂S c. H₂Po d. H₂Te

7.36 x 1024 free oxygen atoms     

Number of carbon atoms in 2.5g of HC2H3O2

Calculate the volume of a given mass of gas at 760mmhg when its volume was increased by 10dm3 st 710 mmHg of the gas

In a particular experiment, 50 drops of HCl solution were dispensed from a burette, and the final and initial readings of the burette were 45.03 mL and 15.03 mL respectively. What was the volume of each drop?

When 47.4 g of KClO3  is completely decomposed, what is the theoretical yield, in grams, of O2 ?     

A student obtained a solid product in a laboratory synthesis.To verify the identity of the solid,she measured its melting point and found that the material melted over a 12^degree C range.After it had cooled,she measured the melting point of the same sample again and found that this time the solid had a sharp melting point at the temperaturr that is characteristic of the desired product.Why eere the two melting points different?What was responsible for the change in the melting point?

1.Explain why ice,which is a crystalline solid,has a melting temperature of 0^degree C.whereas butter,which is an amorphous solid,softens over a range of temperatures.

2.Why is the arrangement of the constituent atoms or molecules more important in determining the properties of a solid than a liquid or a gas?