How many grams of c will be needed to make 4 moles of c

Which tool is least in predicting weather

Is this correct if not can u correct me

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.