What is the difference between a mixture and a substance

Generally, when going down a group on the periodic table: atomic radii decrease ionic radii increase electronegativity increases reactivity decreases

List at least 4 properties of magnetic field lines

A student knows that hydrogen (H) atoms and oxygen (O) atoms combine to form water (620). The student correctly predicts that hydrogen (H) and sulfur (S) will combine to form hydrogen sulfide (H2S). On what is this prediction most likely based?

The current federal agency responsible for safety-related issues of nuclear energy is the: A - Department of Energy B - Atomic Energy Commission C - Nuclear Regulatory Commission D - Environmental Protection Agency

A reaction has a ΔH value of + 120 kJ and a ΔS value of - 42 J/K. At which of the following temperatures is the reaction spontaneous (meaning ΔG is negative) ?

How does the shape of the Earth affect the climate of different regions?

What is Delta. Gsystem for the system that is described by the following data? Delta. Hsystem = - 345 kJ, T = 293 K, Delta. Ssystem = 465 J/K Delta. Gsystem = Delta. Hsystem - TDelta. Ssystem - 481 kJ - 209 kJ 413 kJ 135,900 kJ

Calculate ΔGrxn for this equation, rounding your answer to the nearest whole number. CaCO3 (s) → CaO (s) + CO2 (g) ΔGf, CaCO3 = - 1,128.76 kJ/mol ΔGf, CaO = - 604.17 kJ/mol ΔGf, CO2 = - 394.4 kJ/mol

Using two spring scales, students pull on opposite sides of a dynamic cart at rest. 5 Newtons of force is pulling left and 5 newtons force is pulling right. Describe the motion of the cart? A) The cart will move to the right.

If a mineral has a metallic shine to it, which property of a mineral is being measured