Why is elemental zinc considered a pure substance?

What type of reaction occurs between aqueous ammonia solution and an acid? need it before tomorrow.

When 11.12 g of neon is combined in a 100 L container at 80oC with 9.59 g of argon, what is the mole fraction of argon?

What mass of agcl is produced by mixing 25.0 ml of 1.00 m agno3 with 25.0 ml of 1.00 m nacl?

When 425g of lead pellets are added to a graduated cylinder the water level rises from 25.0mL to 62.5mL so what is the density of the lead pellets?

2. A chemical property is a change in

What is the nearest star in Gemini

In order for a solute to dissolve in a solvent, what must be true?

Radiocarbon dating can be used to determine the age of A a sample less than a million years old B a sample less than 100,000 years old C a sample less than 50,000 years old - D a sample less than five million years old

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 4p (b) n = 3, l = 1, m1 = + 1 (c) n = 5, l = 3

Could the two aqueous solutions be identified through a visual inspection? Explain.