What is 50% of 90?

The rate of sound wave vibration is called?

What element is most likely to form a diatomic molecule? A. Cr B. K C. Br D. Ga

What starting compound and what reagents should be used for most efficient synthesis of 2-bromo-1-iso-propyl-4-nitrobenzene?

calculate the amount of heat energy required to evaporate 25.7g of water at 100 degrees celcius. (Molar heat of vaporization of liquid water = 4.07x10^4 J/mol)

How did surgeon Joseph Lister kill the bacteria in urine specimens he had been studying? A. He added bleach to the samples. B. He added mold spores. C. He froze the samples. D. He raised the temperature of the samples above 212°C.

What can show the presence of carbon dioxide?

How does the shape of a structure affect its overall strength

Kim is doing an experiment with sound waves. She tested to see how quickly a sound wave could travel through three different materials: a metal pole, a helium balloon and a glass of water. She recorded her results.

Which of the following is an example of an electric force that occurs in atoms

5. What is another name for Newton's first law in your own words.