Gizmo Warm-up The Boyle’s Law and Charles’ Law Gizmo™ shows a container of gas. In the container, the small purple spheres represent molecules. 1. Observe the particles. Are they all moving at the same speed?
You have learned that your hypothesis is not correct and that you must explore further. Write a hypothesis about the volume of a balloon when the temperature of the gas in the balloon is changed. If I heat a gas that is in a balloon, then the balloon will expand as the temperature gets hotter. 3. Designing an Experiment: Scientists test hypotheses by designing controlled experiments.
2. Define the following terms: A. Precipitate: The creation of a solid in a solution or inside another solid during a chemical reaction. B. Double displacement reaction: Chemical reactions in which one component each of both the reacting molecules is exchanged to form the products.
They changed because the molecules of hydrogen and helium were moving so fast that they eventually escaped the Earth. 14. Explain how the greenhouse effect works and how it relates to global warming. The greenhouse effect is when radiation at visible wavelengths passes freely through the atmosphere and is absorbed at the ground. The ground heats up and emits infrared radiation.
The concentration of a solution is the amount of solute that is dissolved into each unit of solvent. In this lab, water (H2O) will be the solvent and sugar/sucrose (C12H22O11). When the density of the solute is greater than the density of the solvent, the density is directly proportional to the concentration of the solute. The relative density of the solute to the solvent can be observed by placing some solute into the solvent without mixing. If the solute floats, then the density of the solvent is greater than the density of the solute.
(4 points) q = m × c × Δt Given: q=? m = 34.720g c = 4.18 j/(g x °C) Δt = 41.6°C - 25.2°C = 16.4°C q = (34.720g) (4.18 j/(g x °C) (16.4°C) q = 2380.13j You are trying to figure out the energy change of the water which is the surroundings in the lab. To do that you must take the mass of the metal, which for me was Aluminum, and multiply it by the heat capacity of the water, which was given, then multiply that by the change in temperature, which is the final temperature of the mixture
Part B: The graduated pipet’s average density at 22.3 °C was determined to be 0.9785g/mL with a percentage error of 1.89% shows the graduated pipet to be more accurate and precise. Part C: Density of an unknown NaCl solution was measured and a calibration curve used to determine the percentage of NaCl by mass in the solution. y=0.007x + 0.998 which concluded that the concentration of the sodium chloride solution was 3.14%. INTRODUCTION Anything that you can see, touch, taste or smell, occupies space and has mass, it is called matter. Matter can be a gas, a liquid,
Explain. Use the idea of what happens when these two different types of compounds dissolve in water in your answer. 6. Which compound types (ionic or covalent) produce more particles when dissolved in water and why? 7.
Prominences 1. Prominences are immense clouds of glowing gases that erupt from the upper chromosphere. 2. The loops or arches of gases may shoot as high as 100 000 kilometres from the surface of the Sun. This allows some of the surface gases, mainly hydrogen and helium, to escape into space.
9. Pressurizing fuel rockets Things Helium is Good For 10. Filling balloons. 11. Inert gas shield for people while welding.