Elements cannot be seen with the eye. True False

Given four substances NaCl, ethylene glycol, alcohol, and liquid soap each dissolved in water to yield dilute aqueous solutions. Which one of these solutions would you expect to form a colloid?

What is the value of Kw at 25°C?

Which of the following is malleable? Choices: glass pottery ice gold

ron filings are placed on a scale. As the filings rust, the scale measures an increasing mass. How does the law of conservation of mass apply to these results? A. The law does not apply because a physical change occurred. B.

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. A) 0.5 sec B) 0.3 sec C) 2.3 sec D) 1.9 sec

Where does the largest percent of water exist on Earth?

True or False: It is recommended to use sugar cubes to sweeten lemonade because they have a low surface area.

54,000,000 nanometers equals 0.000000054 megameters.

When cream mixes with coffee, is this a chemical or physical change?

A gas occupies 72.1 at stp. At what temperature would the gas occupy 85.9 L at a pressure of 93.6 kPa?