How many moles of C6H12O6 does 8.2 x 1023 molecules represent

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.

When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two