SCI203_Unit_4_Lab_Report

1.Explain the slogan about chemical safety " A spill, A slip, A hospital trip" 2.How do you apply 5s(sort, set in order, shine, standardize, sustain) to attain chemical safety at home and in school?. Enumerate

Please do Question 2

Which of the following questions would not be of scientific importance? Note: there is more than one correct answer here. a. Does fracking affect the frequency of severe earthquakes? b. What was the best album of 2022? C. What were the radiation levels of the Three Mile Island meltdown? d. Who is the fastest-The Flash, Quicksilver or Sonic the Hedgehog? e. Is there a possible vaccine for RSV?

What safety rules did Andrew break?

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.

What Do you think the old stuff and the new stuff on the chemical reaction it makes a sparker light up

A typical chest X ray exposes a patient to an effective dose of 0.05 mSv. A) How many rem is this? Express your answer to two significant figures and include the appropriate units.   B)How many chest X rays would a patient have to receive before biological effects would be observed? (The limit is >25 rem.) Express your answer using two significant figures.

2. In a Mars Direct mission, the astronauts would return home in an Earth Return Vehicle (ERV) fueled by     methane and oxygen produced from terrestrial hydrogen and Martian CO2     helium-3 extracted from the lunar surface     finely-ground Martian rocks accelerated by an electromagnetic mass driver     cheap, traditional kerosene fuel brought from Earth   We might go back to the Moon someday to mine the lunar surface for an energy resource called     methane     antimatter     hydrazene     helium-3

B. Rates of reaction are typically measured as the change of concentration per unit time. Some typical units of concentration are: M, mM, pM, µM, nM. Some typical units of time are: years, days, hr, s, ms, ps, µs, and ns. For each reaction, suggest a reasonable unit of measure for the rate of reaction. a. The combustion of gasoline. b. The transformation of organic material into crude oil. Chemical change involved with memory in the human brain. с. d. The rusting of an iron nail. 9. Why would a scientist use nM/ps instead of M/s? - 112 -

Read the buret

+ terface/acellus_engine.htm?ClassID=1467683063 Use the data below to determine the mass ratio of iron to oxygen for compound 2. Compound 1 2 Et onal Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [20:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 2 Mass O (grams) 4.45 9.02 Sh Enter

4 Read the following sentence: "When the sun's rays hit a plant's leaves, the plant is able to transform that light-or solar energy-into chemical energy that is then used as fuel." Based on the evidence above, what conclusion can be made? A- This causes plants to produce light. B-- Plants can turn food into solar energy. C-- Photosynthesis only occurs at night. D- Plants need the sun to make food.

How is arson evidence collected and preserved?

Reaction 1 FeO(s) + CO(g) → Fe(1) + CO2(g) AG" > 0 Reaction 2: C(s) + CO2(g) → 2 CO(g) AGzn <0 Overall reaction: FeO(s) + C(s) → Fe(l) + CO(g) AG n < 0 Subm The chemical equations above represent the main reactions that occur during the production of Fe(l) under certain conditions. The overall reaction couples reactions 1 and 2, resulting in a < 0? thermodynamically favorable process. Which of the following best explains whether or not a particle diagram could represent how the coupling of reaction 1 and reaction 2 results in AG A particle diagram that represents the increase in the volume of gaseous product particles would be a good representation of how the coupling of reactions 1 and 2 results in a thermodynamically favorable process. A particle diagram that represents the decrease in the average kinetic energy of the particles would be a good representation of how the coupling of reactions 1 and 2 results in a thermodynamically favorable process. A particle diagram cannot represent…

Cuántos hidrógenos alfa tiene el siguiente compuesto? A 9 B 12 © C) 4 D 8 E 3 0

3.What is a disadvantage of nuclear energy generation? One answer only. A.Nuclear power plants are one of the leading causes of global warming. Global warming is primarily due to thermal pollution. B.Nuclear power plants are considered high-risk. Any accident may leak radioactive materials into the environment. C.Nuclear power plants cause air and water pollution during their regular operation. Nuclear power is a leading cause of air pollution. D.Nuclear power plants are far more expensive to run. Nuclear power is not as affordable as other types of power.

Scientists study the impact of changing only one component of a cancer treatment in a laboratory. Which of the following describes the study? controlled experiment observational study conceptual model computational study