Bio 105 - Homework Chapter 2 1. Atoms are a small unit of matter that retains the properties of an element. Atoms consist of positive protons and neutral neutrons which make a nucleus, and negatively charged electrons which orbits around the nucleus in a clouds. Protons Neutrons Electrons Charge Positive Neutral negative Location in atom Nucleus Nucleus Cloud/shell Size Same as neutrons smaller than electrons About the same as a proton Smaller than both protons and neutrons Function They
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Discussion: The purpose of this lab was to investigate the effects that the intermolecular forces of different sized alcohols had on temperature decrease during evaporation. This was investigated using a thermometer to measure the initial temperature of a cotton ball containing 10 drops of an alcohol and its final temperature after 3 minutes of evaporation. It was hypothesized that Butanol, the largest molecule and the one with the strongest bonds, would experience the least temperature decrease
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In the lab, All That Glitter, students learned to calculate and differentiate the density of different forms of matter. Students calculated the density of pre-1982 pennies, post-1982 pennies, and an unknown metal sample. In order to complete the lab, students first took ten pre-1982 and post-1982 pennies and carefully dried them. Afterwards, the pennies were placed on a digital scale in order to find the mass. Students then found the volume of the pennies by filling the graduated cylinder with
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For this examination, we quantified the speed of the compound response of hydrogen peroxide and guaiacol with the chemical peroxidase, removed from turnips. We tried this response first, by using three pH levels; pH 4.0, pH 7.0 and pH 8.0 to see which pH was ideal for the response of hydrogen peroxide and guaiacol. We utilized a colorimeter to quantify the measure of light that went through the substance at various times amid the response. Based off of our perusing of the colorimeter, we ascertained
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Introduction: What happens if you put baking soda and vinegar together? It is a chemical reaction where gases are released. The chemical name that makes it change is reactivity. The types of matter that are changing is baking soda and vinegar. The problem is how much baking soda, added to 10ml of vinegar, will cause a film canister rocket to shoot the furthest. I think the 7mLof baking soda is going to go the farthest because there is enough room for the gas or pressure to build up and explode
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reacting aqueous solution with an ionic bond: the breaking of the intermolecular forces and use of energy define the direction and product of a chemical reaction. This experiment will reveal how temperatures can either enhance or decrease the reactions rates. Introduction Calorimetry is the measurement of the amount heat exchange in any given chemical reaction. This heat exchange can reality be measured by a thermometer placed within a closed system, as this would ensure no heat would escape.
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WWI affected the soldiers. I knew they used them, but I didn’t know about all of the facts behind the poison. These chemicals were forbid at both The Hague Declaration and Convention. Since Germany was the leading the world in science, the chemists were experimenting with different combinations of chemicals to make lethal gases. Scientists were also curious on the effects these chemicals would have on the battlefield. Considering these gases were outlawed, but were still used should have never happened
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of every living thing and they help body functions occur properly. They are furthermore significant to the field of biology because they have such a large role in keeping organisms alive. This is due to the fact that they affect the rate at which chemical reactions in the body take place and “without enzymes, these reactions would take place too slowly to keep you alive”, which shows how vital enzymes are for survival (Science Museum). They can also be useful for helping create DNA and communication
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it with evidence from your observation table. Test A: A chemical change occurred. I know this because bubbles formed when the two substances mixed. I also know this because a gas was formed, and an indicator of a chemical change is when a new substance forms. Test B: A chemical change occurred. I know this because there was both a production of light, and a production of heat. Also, the change that occurred is irreversible. Test C: A chemical change occurred. I know this because the mixture was opaque
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Neon, mercury, and olive oil change from their natural states of matter when the temperature changes. Once the temperature does change, the particles start moving, and the states of matter change. For example, the movement of the particles in neon are limited as the temperature decreases. The particles of neon in it’s gas form go crazy and speed up, colliding into each other and spread out over all the space. Neon turns to a liquid between -248°C and -246°C. In this stage, the particles can slide
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