Pure Substances (E&C) & Mixtures
How can you identify a mixture?
Carbon is in period 2 and group 14. How many valence electrons will it have?
4 valence electrons
Does the following equation follow the Law of Conservation of Mass? Why or why not?
No - missing a white circle
Using the picture, which structure shows a tissue?
Structure 3
What is the function of the mitochondria in a cell?
"Powerhouse" of the cell, makes energy
Which of the following substances is a compound?
N2
H2O
O3
H2O
These subatomic particles are found in the nucleus.
Protons & Neutrons
The intermolecular attractions are the weakest. Particles are moving quickly and no definite shape is apparent.
Gas
Which organ system is responsible for sensing heat from a hot stove?
integumentary
An organism does not have a nucleus, what type of organism might it be?
Bacteria
Identify the following samples as monoatomic element, diatomic element, compounds, or mixtures.
Sample A - monoatomic
Sample B - Mixture
Sample C- Diatomic
Which group will have the least amount of valence electrons?
Group 1
Using the Triple Point Diagram, which point will have the highest intermolecular attraction between molecules?
L - Solid
If there is a cell will more molecules inside the cell than outside the cell, what will happen to the molecules over time?
The molecules will move out of the cell until the inside and outside are at equilibrium.
What cell organelles determine a plant cell?
Chloroplast
Cell wall
Large vacuole
Draw a diatomic element.
See drawings
How does one tell where the metalloids are located on the periodic table?
If it touches the zigzag line.
If in the photosynthesis equation, 10 grams of water reacts with 16 grams of carbon dioxide and sunlight to make glucose and 7 grams of oxygen. How much glucose should be in the products?
19 grams of glucose
How does the muscular and nervous system work together?
The nerves send a signal to stimulate the movement of the muscle.
What organelle does a plant and a fungus have in common?
Cell wall
Iron and sulfur are mixed together in 2 experiments.
In experiment 1, a stirrer is used and then a magnet can separate it the substances.
In experiment 2, a stirrer is used and heat is applied. A magnet does not work to separate the substances.
Identify the substances made in experiments 1 and 2.
1 - Mixture
2- Pure Substance
Ca
Ar
C
N
He
He and Ar
In an experiment, Jack had 20 grams of reactants, but when he measured the products after the reaction, there was only 16 grams. How is this possible?
Some product was a gas that escaped due to it being an open system.
Describe what happens in a hypotonic solution?
Water moves into the cell and causes it to swell because the outside of the cell is less salty and has more water than the inside of the cell.
Which organelle is found in both prokaryotes and eukaryotes and helps to translate DNA to make proteins?
Ribosomes