Which term describes a pure substance that is made up of only one type of atom?

1) matter

2) rock

3) compound

4) element

What is the [OH-] in a solution with a POH of 7.86? [OH-] = [?] x 10?!)

What type of wavelength do television signals have A. Short B. Intermediate C. long D. Very Rapid

Chlorination of pentane gives a mixture of isomers having the molecular formula C₅H₁₁Cl. The percentage of 1-chloropentane is 22%.

Which statement best describes a Bronsted-Lowry base? A) It must accept protons to form a conjugate base. B) It must accept protons to form a conjugate acid. C) It must donate protons to form a conjugate base.

How many grams of h2 are needed to react with 48 grams of o2, given the reaction: 2 h2 (g) + o2 (g) - - > 2 h2o (l) ?

Which piece of glassware is best suited for making accurate dilutions?

Match each equilibrium constant with the direction that the reaction is favored. question 4 options:k = 6.7 x10-4k = 325k = 1.0 x 107k = 0.0035

A rigid cylinder with a movable piston contains a 2.0-liter sample of neon gas at STP. What is the volume of this sample when it's temperature is increased to 30 degrees Celsius while its pressure is decreased to 90 kilopascal

Write a speech aimed at year 7 to explain why some metals lose their shine over time but gold does not.

How many moles of co2 could fit in a 475 ml bag at - 22c and 1.125 atm?