If you were trying to build a soundproof room which of the following materials would you choose in order to absorb the most sound based on the coefficient of

absorption for each material

Consider the following balanced equation: 3CuO (s) + 2NH3 (g) → 3H2O (l) + 3Cu (s) + N2 (g) If 70.8 moles of CuO (s) and 40.1 moles of NH3 (g) are allowed to react, what is the theoretical yield of Cu (s) in moles?

A reaction produces 0.863 moles of H2O. How many molecules are produced?

How many neutrons are in silver

Choose all the answers that apply. Which of the following usually indicates a chemical reaction? gas bubbles color change increase in temperature decrease in temperature release of light energy

What temperature units do scientists commonly use?

What element is represented by the following electron configuration: 1s22s22p63s23p64s23d4 Question 2 options: Cr Ca Ge Ar

He substance, cocl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

The weighted average atomic mass of an element depends upon the a. relative abundance of protons in the element b. mass and relative abundance of each isotope of that element c. mass and relative abundance of each neutron of that element d.

What part of an atom do we change for isotopes

The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/L. Water suppliers must periodically test their water to ensure that mercury levels do not exceed 0.002 mg/L.