Para que serve as piramides alimentares?

If energy cannot be created, where did the types of energy you observed when the tortilla chip burned come from?

In which of the following phases of matter do molecules have the highest amount of energy? A. liquid B. gel C. solid D. gas

Which of the following best describes what happens when molecular compounds melt? A.) Molecules separate into their component atoms. B.) Molecules move more slowly. C.) Molecules arranged in an irregular pattern change to a regular pattern. D.

Shane, who lives in Perth, Australia, has never seen a white Christmas. In fact, December is one of the hottest months in Australia. Why is it that Australia has such warm weather at this time of year?

Atomic oxygen would most likely form its most stable monatomic ion when it: 1. elevates one electron from the s orbital to a p orbital. 2. elevates one electron from a p orbital to a d orbital. 3. loses one electron. 4. gains one electron. 5.

Which two properties are used to define matter? has mass and conducts heat has buoyancy and volume has mass and takes up space conducts energy and has characteristic properties

Calculate the energy if 48.7 g of Al reacts in the following reaction. (Al = 26.98 g/mol) Fe2O3 (s) + 2 Al (s) →Al2O3 (s) + 2Fe (s) ∆Hrxn = - 852 kJ.

Which type of wave has a wave perpendicular to the disturbance? Surface Longitudinal Mechanical Tranverse

Caffeine's molecular formula is c8h10n4o2. the molar mass of caffeine is 194g/mol. what is the percentage of carbon in caffeine

Which will evaporate more quickly: 55 mLmL of water in a beaker with a diameter of 4.5 cmcm, or 55 mLmL of water in a dish with a diameter of 12 cmcm?