In a balanced chemical reaction, the total mass of the products always equals the

What is the independent variable; how does salt change the temperature at which water freezes?

Which horizon in a soil profile contains nutrients as a result of leaching? a. horizon A b. horizon E c. horizon B d. horizon C

Synthetic fibers, like plastic, are derived from organic compounds. These fibers have been chemically changed by humans to last longer for better storage and more effective uses.

Which of the following is an example of biotechnology 1. A petroleum-based lubricant used in farming machinery 2. A driverless, solar-powered automobile 3. A robotic probe on Mars that can detect water 4. A mechanical implant that delivers medicine

What traits do all organisms with no internal themoregulation have? A Ectothermy B Epidermthermy C Exothermic D Endothermy

If the caffeine concentration in a particular brand of soda is 2.85 mg/oz, drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

Suppose that your favorite AM radio station broadcasts at a frequency of 1600 kHz. What is the wavelength in meters of radiation from the station? (Hint: convert kHz to Hz and find frequency first.)

Reaction rate lab report

The absence of which cell structure would indicate a cell is prokaryotic?

When 0.880 g of an organic compound containing carbon, hydrogen and oxygen is burned completely in oxygen, 1.760 g of co2 and 0.720 g h2 o are produced. what is the empirical formula of the compound?