Oxygen mask

Emma Kilgore Science Period 2 January 12, 2016 The Evaporation of Liquids When a liquid is left in a warm car over a certain period of time some people might notice that the liquid seems to have lessened. This is because of evaporation, evaporation is when a liquid changes into a gas because of an increase in temperature or pressure. This brings up many questions having to do with liquids and evaporation so, do all liquids take the same amount of time to evaporate?…

Figure 2.1 perbromate (BrO4-) is an ion. It carries a molar mass of 143.902 g/mol. Perbromate has 32 valence electrons; bromine carries 7 and oxygen carries 24 plus one since it is an ion. The Lewis structure of perbromate is a tetrahedral. Although the structure contains 32 valence electrons, it obtains a total 1 single bond and 3 double bonds. The oxygens in the Lewis structure follow the octet rule however bromine does not. Bromine (besides hydrogen) does not follow the octet due to certain…

plants because they contain Chlorophyll, used in photosynthesis. The Chlorophyll is what made it possible for plants to absorb and process the sun's energy and combine it with carbon dioxide and water to grow and make food. Photosynthesis also releases oxygen for humans to breath. 2) List two reasons and explain why the chloroplasts were helpful for the sea slug. One reason for why the chloroplasts are helpful for the sea slugs is because they store up the chloroplasts in order to become…

The Freezing point of water is 32° fahrenheit, But does anything affect the freezing point of water? The effect of salt and sugar lowering water’s freezing point is called Freezing Point Depression(FPD). When water freezes, its molecules slow down and “stick” together, and eventually slow down so much they stay in place and become a solid. However when salt or sugar is added, it “interferes with the formation of the crystalline bonds between water molecules that give ice its solidity”, Written…

buffer throughout the experiments conducted. This was done to observe the effect different levels of pH buffers have on the breakdown of hydrogen peroxide and the volume of oxygen released. The results from the majority of experiments conducted reflect that though they are in consensus with the hypothesis that the volume of oxygen will be at its highest at pH 7, it was found that the temperature of hydrogen peroxide and the batch of catalase may have varied which affected the precision of the…

Chlorine is a chemical added to swimming pools to keep the water free of bacteria and algae. Chlorine levels in swimming pools vary based on how much chlorine has already been used to remove bacteria and how much sunlight has broken down the chlorine molecules. This means that pool owners spend a lot of time testing and adjusting the levels of chlorine in their pools. To reduce the amount of time spent on pool maintenance, pool chemical manufacturer's created chlorine tablets. These tablets are…

Merriam-Webster defines hypothermia as a condition in which the temperature of the body is very low. This condition is a medical emergency that occurs when the body loses more heat than what it is able to produce; hence, the body temperature decreases. The part of the brain called the hypothalamus is responsible for controlling body temperature; therefore, hypothermia is the result of the dysfunction of the hypothalamus. In order for a person to become hypothermic, their body temperature must be…

Conclusion: The the precipitation reactions lab eight out of the fourteen occurring reactions were precipitates. A precipitate means that a solid substance was formed or a substance that is not aqueous was formed. The reactions that did not form a precipitate were DNR, which means that they did not react. At station one barium chloride and potassium nitrate did not react but barium chloride and silver nitrate reacted to form barium nitrate and silver chloride. The precipitate at station one was…

heart can no longer keep up with the normal demands placed on it to pump blood to the rest of your body. Blood miscommunications is another type of CHD that can cause the blood to go to other parts of the body. This can be fatal because blood carries oxygen and nutrients to your body's tissues and it takes carbon dioxide and waste products away from the tissues. It is also needed to sustain life and promote the health of all the body's tissues. Congenital Heart Disease has many therapeutic…

through oxidative phosphorylation which a small amount of input from glycolysis. The main substrate source for prolonged exercise is fat from adipose tissue. Oxygen is essential to cellular…