Which of these changes involved a physical change and not a chemical change?

Why is it illegal to manufacture fireworks without a license

Chemical engineers who specialize in negotiating for large purchases and instructing customers in use of the products are: A. corporate managers B. legal services C. marketing personnel D. product developers

One disadvantage of vacuum distillation is it is inherently less efficient than fractional distillation at atmospheric pressure. a. True b. False

What is the velocity of a ball falling with 100 joules

Which conversion factor is the correct on the use? 1 mole/6.02 x 1023 molecules or 6.02 x 1023 molecules / 1 mole

What happens when the threat of exposure to dirty air is reduced in a community? There is enough oxygen available for people's lungs to function normally The amount of indoor air pollutants released during a fossil fuel burn decreases There is a

Is chicken noodle soup an element, a compound, a homogeneous mixture, or a heterogeneous mixture?

How is the amount of sunlight affect the makeup of an ecosystem

How many moles are in 65 g of carbon dioxide (CO2) ?

kilograms represented by the mass defect for thorium - 234=3.09x 10-27 kg what is the nuclear binding energy for thorium - 234