Solutions
Unit conversion and scientific notation
Separation methods
Toxicity and contamination
Percentage concentration
Miscellaneous
100
a substance that dissolves other substances
solvent
100
Give me 2 units to measure
Temperature
Distance
Volume
Weight
Temperature: Kelvin, celsius, farenheit
Distance: miles, kilometers, centimeters
Volume: gallons, liters, mL, quarts, pints
Weight: kg, stones, pounds, ounces
100
used to separate a magnetic substance (such as iron) from a mixture containing non-magnetic substances
magnetism
100
Daily consumption causing liver cirrhosis and other organ damage.
What type of toxicity is this an example of?
chronic
100
Complete the following
_________ _______ is another way to express the amount of a particular substance in a mixture relative to the total amount of the mixture.
percentage concentration
100
Name an element that ends with n
Iron, nitrogen, neon, radon, oganessum, carbon, titanium, rhodium, ruthenium, tungsten, tantalum, hydrogen, radium, actinium,
200
a homogeneous mixture formed from dissolving a solute in a solvent.
solution
200
Convert 5 liters into quarters when given 0.95 liters in a quart
5 liters * 1 quart / 0.85 L = 5.88 quarts
200
Method that Is used to separate solids of different sizes, which are passed through a mesh.
sifting
200
Complete the phrase
The ______ makes the ______
dose, poison
200
In a solution of sulfuric acid (H2SO4), 300 mL of the solution contains 8% sulfuric acid by volume. Determine the volume of sulfuric acid in the solution.
24 mL of sulfuric acid
200
Name 4 heavy metals (toxic)
Arsenic, lead, mercury, cadmium and beryllium
300
measures how much solute will dissolve in a specific amount of solvent.
solubility
300
Convert 8.8 ounces to grams when given (28 grams in an ounce)
8.8 ounces * 28 grams / 1 ounce = 246.5 grams
300
separates a dissolved solid from a liquid. The solvent (liquid) is lost into the surroundings.
evaporation
lithium, salt
300
Mention 3 that gases contribute most significantly to air pollution, what are some of their effects?
Five major gases contribute to air pollution: CO₂, from fossil fuels and deforestation, drives global warming; CH₄, from agriculture and landfills, is a potent greenhouse gas; NOₓ, from vehicles and industry, causes smog, acid rain, and respiratory issues; SO₂, from burning coal and oil, leads to acid rain and lung irritation; and O₃ (ground-level ozone), formed by NOₓ and VOCs in sunlight, harms health and crops. These gases worsen climate change and damage ecosystems.
300
A lake near a community in Monterrey, Nuevo León, is tested for mercury contamination. The World Health Organization (WHO) limit for mercury in drinking water is 6 ppm. A water sample weighing 4,500 g was found to contain 0.03 g of mercury.
6.67 ppm .... above limit
300
Element 30 on the Periodic Table is often found in lotions and preparations to prevent sunburn and windburn. What is the two-letter chemical symbol (not the element's name) for Element 30?
ZINC
often found as zinc oxide
400
contain more than the maximum amount of dissolved solute than the solution is able to dissolve at a given temperature (more temperature is needed to provide solubility)
supersaturated solution
400
The distance from the earth to the moon is
384.400 km express this in scientific notation with three significant figures
3.84 x 10*5
400
__________ method is only possible if two liquids have different _________ points
distillation,
boiling
400
Noise pollution refers to harmful or excessive levels of noise in the environment, which can negatively impact human health, wildlife, and ecosystems. It is caused by activities such as transportation (cars, airplanes, trains), industrial processes, construction, and urban development. Common effects of noise pollution include:
On Humans: Hearing loss, stress, sleep disturbances, and reduced productivity.
On Wildlife: Disruption of communication, migration, and mating patterns, particularly in animals like birds and marine mammals.
400
How many mL of hydrogen peroxide are needed to make a 8.5% solution by volume of hydrogen peroxide if you want to make 450 mL of solution?
38.25 mL
400
Name the planets of the solar system in correct order (from the sun to the farthest planet away from the sun)
Mercury, venus, earth, mars, jupiter, saturn, uranus, neptune
500
Elements that form a ___________ are always in a definite proportion
compound
500
Multiply
(2 x 10*4) x (6 x 10*7)
And express in scientific notation
12 x 10*11
500
_____________ separates a heavier substance from a lighter one. This is only possible if they have different __________
decantation, densities
500
What is leachate? Mention the specific risk of leachate in landfills, clearly mentioning the term infiltration and the consequences this can have on other ecosystems
Leachate is the liquid that forms when water percolates through waste materials, such as in a landfill, dissolving and carrying with it various toxic substances, chemicals, and microorganisms. This liquid often contains hazardous components like heavy metals, organic pollutants, and pathogens.
Infiltration... contamination of water sources, soil degradation and pollution, harm to aquatic ecosystems
500
In a carbonated beverage, (sparkling water) CO₂ gas is dissolved in water. The solution is pressurized to keep the gas dissolved.
- What is the solute in the carbonated beverage?
- What is the solvent?
- How does pressure affect the solubility of CO₂ in the water?
- What happens to the solute (CO₂) if the pressure is released?
1. Carbon dioxide
2. Water
3. higher pressure increases the amount of CO₂ gas that can dissolve in water.
4. CO2 immediately is released as gas, forming bubbles
500
What mexican man won the nobel prize in 1995
Mario Molina picked up a 1995 Chemistry Nobel for his role in discovering that CFCs (chlorofluorocarbons) are a threat to O3 (ozone) UV-absorbing portion of Earth's stratosphere
