Which of these is a mixture

1) carbon

2) carbon dioxide

3) air

4) oxygen

How many total moles of atoms are there in one mole of silver (I) phosphate, Ag3PO4

A 60.0-g sample of fermium-253 was placed in a sealed vessel 9.0 days ago. Only 7.5 g of this isotope is now left. What is th half-life of fermium-253? 3.0 days 4.5 days 17.5 days 20.0 days

A graduated cylinder contains 167 mL of water. A 20.0-g piece of iron and a 23.0-g piece of lead are added. What is the new water level, in milliliters, in the cylinder?

What is starchelement compound or mixture

Ions that are made of more than one atom are examples of

Ethanoic acid and 1-butanol can react to produce water and a compound classified as an 1) aldehyde 2) amine 3) ester 4) halide

Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. which equation below best describes the balanced equation for this reaction?

2H2 + O2 - - > 2H2O If 16 mol of oxygen were reacted with excess hydrogen gas, how many moles of water would be produced?

Which subatomic particle identifies an atom as that of a particular element? how is this particle related to the atoms atomic number

Which of the following prefixes means seven