Mixture or Compound
Water (H2O) and carbon dioxide (CO2). Mixtures or compounds?
What are compounds? (The elements have been chemically bonded together, which makes them difficult to separate.)
Atomic number: 17
Discovered in 1630 by Jan Baptist van Helmont. It is a yellowish-greenish gas, commonly used (in compounds) for disinfectants and plastics. It was also used as a poisonous gas in WWI and WWII.
What is chlorine gas?
This CDA staff member met Chad Channing from the 90s grunge band Nirvana.
Who is Mrs. Zylstra?
The smallest part of an element, composed of a nucleus of protons and neutrons surrounded by a cloud of electrons located in orbitals according to their energies, is a/an...
What is an atom?
A certain liquid has a density of 16.21 x 102 kg/m3. If finding the volume of 375.0 g of this liquid, what equation would you use?
P = m/V
A salad. Mixture or compound?
What is a mixture? (The "elements" of a salad are easy to "break apart" into their individual pieces, like picking tomatoes or mushrooms out of a salad. A salad would also be classified as a heterogeneous mixture.)
Atomic number: 6
Discovered in 1772 by Antoine Lavoisier. It's Latin name means coal or charcoal. 1/5th of the human body is composed of this element.
What is carbon?
This CDA staff member has butchered 100 chickens at once.
Who is Mrs. Salo?
A solution of metals, formed by melting the metals, mixing them thoroughly, and allowing the solution to harden, is known as a/an...
What is an alloy?
A typical plate of glass in a window is 0.125 in thick. In glass, the speed of light is typically 65.8% of the speed of light in a vacuum. If sunlight is hitting the window and you are solving for much time does it take the sunlight to get through the glass, what equation do you use?
v = d/t
Brass and bronze. Mixture or compound?
Atomic number: 82
No known discovery date or person. These salts were used as wine sweetener from the 11th century until it was legally prohibited for use in 1750 due to it's high toxicity to humans.
What is lead?
This CDA staff member completed a marathon in Dublin, Ireland.
Who is Mrs. Goodnough?
A chemically bonded cluster of atoms; the smallest particle in compounds formed by covalent bonding between nonmetals (including hydrogen), is known as a/an...
What is a molecule?
The density of Mercury is 13,600 kg/m3. If determining the mass, what equation would you use?
P = m/V
Ammonia (NH3). Mixture or compound?
Ammonia is a compound. (Nitrogen and hydrogen have been chemically bonded together and are difficult to separate.)
Atomic number: 10
Discovered in 1898 by Sir William Ramsay and Morris M. Travers. Discovered shortly before krypton, and is the 4th most abundant element in the universe. It is a noble gas, which means it does not form compounds with any other elements.
What is neon?
This CDA staff member attended elementary school and college in British Columbia.
Who is Mrs. Lee?
A heterogenous mixture formed by substances in two different phases, is known as a/an...
What is a colloid? (Also acceptable, colloidal dispersion.)
An athlete heaves a 12.0-pound shot put with a force of 645 N. What TWO equations will you need to solve for the acceleration?
Fw = mg and a = F/m
Fog. Mixture or compound?
What is a mixture? (Fog is both a heterogeneous mixture and a colloid or colloidal dispersion.)
Atomic number: 12
Discovered in 1755 by Joseph Black. It is used to create lightweight alloys, helps muscle and nerve function, and is used in fireworks because of its flammability and bright white flame.
What is magnesium?
This CDA staff member is allergic to ants and has been to the hospital 3 times because of them.
Who is Mrs. Palmer?
Anything that contains matter. (Keep your brain in THIS chapter!)
What is a substance?
The space shuttle weighs 4,500,000 lb and the thrust of the engines is 1,225,704 lb. If solving for acceleration (when the engines fire), what TWO equations would you use?
Fw = mg and a = F/m