Chemistry, 25.10.2020 05:00 hemriccaleb1213
Pre-Lab Information Purpose Explore the rate of a chemical reaction at different temperatures and with different reactant particle sizes. Time Approximately 45 minutes Question What are the effects of temperature and a reactant’s particle size on reaction rate? Hypothesis 1 If you increase the temperature of a reaction, then the reaction rate will increase because particles experience more collisions at higher temperatures. Hypothesis 2 If you decrease the particle size of a reactant, then the reaction rate will increase because more of the reactants’ surface area is exposed allowing more particles to make contact with each other. Variables Independent variables: particle size, temperature Dependent variable: reaction rate Summary The reaction between effervescent tablets and water will produces CO2 gas, which you can observe in the form of bubbles; when the bubbling stops, the reaction is complete. You will measure the reaction times and rates for tablets dissolved at four temperatures and broken into three different particle sizes
Answers: 2
Chemistry, 21.06.2019 22:30, larreanathalie3523
The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.
Answers: 2
Chemistry, 22.06.2019 07:30, eburnhisel2023
The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.
Answers: 1
Chemistry, 22.06.2019 18:30, madmatt873
What volume of a 0.0606 m solution of strontium bromide is needed to obtain 0.340 mol of the compound? question 42 options: a)5.61 l b) 3.4 l c) 600 ml d) 1 l e) 178 ml
Answers: 1
Pre-Lab Information Purpose Explore the rate of a chemical reaction at different temperatures and wi...
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