Unit 1: Scientific Activity
The first stage in the scientific method.
What is observation?
The measurement of how much space an object occupies.
What is volume?
Everything that has mass and occupies space.
What is matter?
Substances that cannot be separated into other substances.
What are simple substances?
The event when a substance disappears and another, new one, appears.
What is a chemical reaction?
A set of ordered steps that ensure we can explain phenomena with great confidence.
What is the scientific method?
The device used to measure mass.
What are scales?
Whatever their states of aggregation, their physical and chemical properties are uniform in any part of them.
Groups of atoms ordered in a geometric structure.
Balance this equation: 2Cl2 (g) + 3 O2 (g)
What is 2 Cl2O3 (s) ?
Any physical property we can measure.
What is magnitude?
The density of mercury is 13600 kg/m3. Calculate the volume that 200 grams of this metal would occupy.
The matter system of oil and water.
Heterogeneous
The mass of an atom with 3 protons, 3 electrons, and 4 neutrons.
What is 7?
The type of reaction that occurs when you soak limescale in vinegar.
What is an acid-base reaction?
Convert 340 g to the SI.
What is 0.34 kg?
The fourth state of matter.
What is plasma?
The matter system for mayonnaise.
What is a colloidal system?
The isotope used to date artifacts in archaeology.
What is carbon-14?
They type of reaction that occurs when silver tarnishes.
What is metal corrosion or a redox reaction?
Express 0.0025 in scientific notation.
What is 2.5 x 103 ?
We have a gas enclosed in a cylinder at a pressure of 1.2 atm, occuyping a volume of 2.5 L. We increase the pressure to 2 atm and the temperature is constant during the process. Calculate the final volume.
47
What is 1.5 L?
Calculate the concentration expressed in volume percent of a solution prepared with 200 mL of ethyl alcohol, which has had water added to complete 500 mL of solution.
What is 40%?
The element with the highest stable isotopes of any element--10.
What is tin?
One of the most important purposes of chemistry in our lives?