If I mixed milk and vinegar together would it be a chemical or physical change?

About 70% of earth is covered in water, making 30% of earth potentially habitable by humans. Earth can be modeled as a sphere with diameter 12, 700 km. There are 7.1 billion people in the world.

Given that the vapor pressure of water is 17.54 torr at 20 °c, calculate the vapor-pressure lowering of aqueous solutions that are 2.20 m in (a) sucrose, c12h22o11, and (b) aluminum chloride. assume 100% dissociation for electrolytes.

Which of these would be most easily separated using a centrifuge? A. a solution of sugar in water B. a suspension of dirt particles in water C. a metal consisting of copper and zinc D. a compound made of hydrogen and carbon

Double-replacement and acid-base reactions are examples of redox reactions. a. true b. false

List the different kinds of nitrogen bases

How many atoms will you find in 2.0 moles of he?

An atom of nitrogen has seven electrons. Which diagram correctly respresents the arrangement of these electrons?

A farmer has concerns about the nitrogen levels in her soils. What can she do to ensure that the nitrogen bacteria are replenished in the soil? Question 6 options: Clear cut the area surrounding the field.

The changing of gas to liquid

A very simple assumption for the specific heat of a crystalline solid is that each vibrational mode of the solid acts independently and is fully excited and thus cv=3NAkB=24.9 kJ / (kmol⋅K). This is called the law of Dulong and Petit.