Exp 15 combined 2020

MODULE 14 DATE: PAGES: U if two molecules want to reactant together to form new Chemicals, what is the first thing that m for a reaction to occur! ust happen

20 Balance the following equation and identify the reaction type (Spelled Correctly!): 02 Reaction type 18 21

For the reaction, Al (d,a) X O X is Mg-25 O x is Mg-22 O x is Fe- 26 O x is Fe-25

31D 15 undo 'H → 32P+ ? 15 Express your answer as a particle. ? OA chemical reaction does not occur for this question.

How can the reaction rate for a high pressure gaseous reactant be slow at low temperatures? A) Particles may not have the correct orientation and/or low collision frequency.   B) Particles may not have the correct orientation and/or do not have enough surface area.   C) Particles may not have enough energy and/or low collision frequency. Particles may have low collision frequency and/or do not have enough surface area.   D) Particles may not have enough energy and/or do not have enough surface area.   E) Particles may not have the correct orientation and/or do not have enough energy.

Whats the purpose of Rates of Chemical Reactions: A Clock Reaction Experiment?

RESET 17 18 19 Lab Data Mass of magnesium (g) Moles of magnesium (mol) Temperature of water (°C) Temperature of water (K) Vapor pressure of water (mmHg) Barometric pressure (mmHg) Observations Volume of hydrogen gas collected (mL) Volume of hydrogen gas collected (L) Pressure of hydrogen gas (mmHg) Pressure of hydrogen gas (atm) Moles of hydrogen gas produced (mol) Ideal gas constant (L-atm-mol¹-K¹) How to calculate ideal gas constant 0.018 0.00074 22.0 295.15 19.8 774 HOW SHIT X Water Vapor Pressure Table 2 3 4 5 6 7 8 PHASE 6: Collecting hydrogen gas over water Complete the following steps: Invert eudiometer into beaker of water Observe reaction. Record your observations in Lab Data At reaction's completion, equalize liquid heights. Zoom in on eudiometer and use up/down arrow to raise or lower eudiometer Measure volume of hydrogen gas. Record in Lab Data Calculate pressure of hydrogen gas produced in mmHg. Record in Lab Data Convert pressure of hydrogen gas produced to atm. Record in…

3. Fresh fish and meat that are not stored in a refrigerator shows signs of spoilage in less than a day. What has caused this spoilage? a. presence pf microorganisms b. oxygen in air c. temperature changes d. all of the above 4. The rate of reaction increases as the temperature increases. Which of the following statements provides the best explanation for this? a. at lower temperature the particles do not collide with each other. b. at higher temperature the particles have more energy, move faster, and collide more than often. c. higher temperature has higher activation energy. d. increasing the temperature increases the number of particles, so they collide more often.

A Moving to another question will save this response. uestion 7 A sample of 121 has a half hfe of 1.7z 10' years. How many years would it take for the reactivity of the sample to fall to 5% af ats curent level? 29, Moving to another question will save this response. ake Test FFNAL

4. The rate of reaction increases as the temperature increases. Which of the following statements provides the best explanation for this? a. at lower temperature the particles do not collide with each other. b. at higher temperature the particles have more energy, move faster, and collide more than often. c. higher temperature has higher activation energy. d. increasing the temperature increases the number of particles, so they collide more often.

A certain amount of insecticide is washed out into the lake on June 1 , leading into concentration of 5.0 x 10-7 g/mL. What is the concentration of the insecticide in water on June 1 of the following year? The half-life of an insecticide in water is 0.0154 year. Solve with complete solution.

1. The amount of phosphorus present in a sample at a given time is given by the following equation:?? = ?0?−0.03?What percent of the initial amount of phosphorus is left after 25 days of decay?2. If there are 37 kg of the element left after 25 days, in problem no. 1, what was the initial amount of the element? round off final answers to four decimal places. complete solution

5-6

a) HJinitinl Rate in M-s 2.5 x 10 Experiment initial 1 0.0020 M 0.0050 M 2 0.0020 M 0.0025 M 1.3 x 10 0.0015 M 0.0025 M 1.3 x 10 4. 0.0050 M 0.0010 M 0.5 x 103 According to the experimental data and by considering the reaction given below, find and demonstrate the way to calculate the rate law. Explain each step. Initial rate data: 2H,(g) + Cl{g) –→ 2HCI(g) b) Consider this reaction. 4NH,(g) + 30,(g) 2N{g) + 6H,O(!) If the rate of formation of N, is 0.10 M-s, what is the corresponding rate of disappearance of O,? Explain step by step how to calculate the target value.

Please question 27 and 28

Part 1: Making Sandwiches: O Cheese 4 slices 1) The is a simulation of a two-reactant synthesis reaction. 2) Take some time and familiarize yourself with the simulation. 6 slices 8 slices 3) Set the reaction to a simple mole ratio of 2:1:1 4) Complete the table below while making tasty cheese sandwiches: Bread Used Cheese Used 2 slices 3 slices 28 02 5 AD Reactants PRE 5 2 3 Sandwiches Made Products 5 sandwiches 4 sandwiches Leftovers

Write the balanced reaction that corresponds to the data in graph.