A catalyst is: A. a solid product of a reaction. B. one of the reactants in a single-replacement reaction. C. not used up in a reaction. D. the product of a combustion reaction.

Which of the following is a soft metal in the lightest element that is a solid at standard temperature and pressure? A) lithium B) silicon C) silica D) cobalt

How does a heat sink improve cooling inside computers?

19. 4.0 L of a gas at 1.0 atm is compressed into a 0.85 L cylinder. What is the pressure of the compressed gas if its temperature remains constant? a. 3.4 atm c. 0.21 atm b. 0.15 atm d. 4.7 atm

Hydrogen atoms are excited by a laser to the n = 4 state and then allowed to emit. What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system?

Calculate the pH of a solution that has a [OH-] of 2.6 * 10^-6 M. A. 8.4 B. 6.5 C. 7.7 D. 6.29

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

In the laboratory how could you determine if a solid as an ionic or metallic bond

Which object (s) formed last in our solar system? the Sun the solar nebula the inner planets the planetesimals

How many grams of sodium are represented by the symbol Na?

Drag the missing word into place I saw a shooting star. My teacher said that the streak of light was a (n) asteroid atmosphere meteor