Recycling of aluminum cans is an example of A) increasing entropy is a nonspontaneous process B) decreasing entropy is a nonspontanous process C) increasing entropy is a spontaneous process D) decreasing entropy is a spontaeous process.

Which of the following pairs does not share the same empirical formula? 1) CH2O and C3H6O3 2) PbCl2 and PbCl4 3) NO2 and N2O4 4) C3H12 and CH4

The emission spectrum of gold shows a line of wavelength 2.76x10^-7m. What is the corresponding frequency of this light? How much energy is emitted in production of this radiation?

2. How fast would a 0.25 kg football have to be traveling to have the same momentum as a 0.05 kg bullet travelling 500 m/s?

Potential energy is also referred to as what?

Sodium ion (Na+) and calcium ion (Ca2+) produce nearly the same color in a flame test (yellow and yellow-orange, respectively). Describe a way to differentiate between the two using a solution of Na2CO3 and write the correct balanced equation (s).

Determine the number of moles 28.8 g Br2

Which statement best explains why heating a liquid affects its viscosity?

In which type of unconformity is the eroded rock tilted or folded? disconformity nonconformities angular unconformity scarp unconformity

What's the difference between an iconic bond and a covalent bond? A. an iconic bond Is a bond between charged atoms, while a covalent bond is a bond between neutral atoms B.

4. Given the chemical formulas of the following compounds, name each compound and state the rules applied to determine each name. Score • RbF • CuO • (NH4) 2C2O4 (Note: C2O4 - is called oxalate.)