Ch_9_Principles_in_Action

Please answer the following question:

Calculate the water activity/ water content based on the nutrition information given on the image. Elaborate your answer.

What is a possible testable question (in correct format) That Mrs love might ask for this Sanrio?

Which of the following best define systems thinking in chemistry? Systems thinking is learning about chemistry within real-word contexts. Systems thinking focuses on the interdependence between chemistry components, as well as the influence of chemistry on other systems. Systems thinking is a way of thinking about chemistry systematically.

part 1 Which of the following is FALSE regarding water treatment?   Disinfection is carried out using radiation or chemical agents.   Settling of floc during sedimentation is always a chemical process.   Addition of activated carbon as filter media is done to remove odorous organic compounds.   Algae removal from water can be done using aeration

Ethylene (CH₂CH₂) is the starting point for a wide array of industrial chemical syntheses. For example, worldwide about 8.0 × 10¹0 kg of polyethylene are made from ethylene each year, for use in everything from household plumbing to artificial joints. Natural sources of ethylene are entirely inadequate to meet world demand, so ethane (CH₂CH3) from natural gas is "cracked" in refineries at high temperature in a kinetically complex reaction that produces ethylene gas and hydrogen gas. Suppose an engineer studying ethane cracking fills a 35.0 L reaction tank with 35.0 atm of ethane gas and raises the temperature to 400. °C. He believes K₂=0.20 at this temperature. Calculate the percent by mass of ethylene the engineer expects to find in the equilibrium gas mixture. Round your answer to 2 significant digits. Note for advanced students: the engineer may be mistaken about the correct value of Kp and the mass percent of ethylene you calculate may not be what he actually observes.

Revi MISSED THIS? Read Section 4.2 (Pages 141 - 145) ; Watch KCV 4.2, IWE 4.2. Part A Nitric acid is a component of acid rain that forms when gaseous nitrogen dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous nitric acid. Enter a balanced chemical equation for this reaction. Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣφ OA chemical reaction does not occur for this question. Submit Request Answer Provide Feedback 62 a

You have just started working in an Urgent Care Clinic as a nurse.  Mom brings in her 3 year old little boy, Brandon.  Mom states that Brandon has been having fever up to 104F and he isn't eating or drinking anything because he feels very sick to his stomach, not to mention crabby!  He's also been pulling a lot at his right ear and sounds congested.  At the last well visit with the Pediatrician (about 2 weeks ago), Mom states that Brandon weighed 32 pounds. On exam today, his weight is 12.5 kg.  Additionally his eyes are darkened and sunken, his mouth is dry with some white crusting around the lips.  His temperature is 39C, other vitals signs are normal.  Though he looks ill he appears to be medically stable.  The doctor rushes in, quickly exams Brandon, diagnoses him with otitis media and then barks off orders to you that you then need to convey accurately to Mom.  The orders include:  push fluids, ibuprofen 10mg/kg every 6 hours if temp > 38C, and begin taking a 10-day course of…

As you investigate the relationship of oil and plastic, add boxes to the images below. Each box should provide a deep explanation of the relationship between oil, water bottles, and society. (Draw it, please)

Ethylene (CH₂CH₂) is the starting point for a wide array of industrial chemical syntheses. For example, worldwide about 8.0 × 10¹0 kg of polyethylene are made from ethylene each year, for use in everything from household plumbing to artificial joints. Natural sources of ethylene are entirely inadequate to meet world demand, so ethane (CH3CH3) from natural gas is "cracked" in refineries at high temperature in a kinetically complex reaction that produces ethylene gas and hydrogen gas. Suppose an engineer studying ethane cracking fills a 80.0 L reaction tank with 14.0 atm of ethane gas and raises the temperature to 850. °C. He believes K₂=0.60 at this temperature. alo Calculate the percent by mass of ethylene the engineer expects to find in the equilibrium gas mixture. Round your answer to 2 significant digits. Ar Note for advanced students: the engineer may be mistaken about the correct value of K, and the mass percent of ethylene you calculate may not be what he actually observes. % 0x₁…

8. A student made a series of measurements of Mg* concentration in drinking water giving the following values: 269 ppm, 215 ppm, 248 ppm, 242 ppm, 238 ppm, 259 ppm, 265 ppm What is the experimental (or calculated) Q value for this data set? Determine if any values should be rejected from this data set at the 90% confidence level.

An action will release carbon tetrachloride to the atmosphere resulting in an air concentration at the source of 10° g/m3. Assume an adult inhales this contaminated air from 5pm to 9am on weekdays and 24 hours/day on weekends for their entire life, that it takes 5 minutes for the source to reach his window. Determine if the lifetime risk of developing a fatal form of cancer is acceptable.

2. Show solution. Thanks!

Will a ppt of SrF2 form if you mix 6.6 x 10-2 M Sr(NO3)2 (aq) with 9.8 x 10-6 M NaF (aq)? (Which of the following is entirely correct?) Q = 6.5 x 107, ppt forms OQ = 2.5 x 10-11, no ppt Q = 6.3 x 10-12, no ppt %3D OQ = 6.3 x 1012, ppt forms O Q = 6.5 x 107, n o ppt

For part B, it is not 4.98 x 10-41. I put it in and it was wrong. It is looking for P1.

Activity 6: Be a Science Detective! Directions: Investigate and analyze the given situation. Provide an explanation for the phenomenon. Based on the kinetic molecular model, solids usually have higher densities compared to liquids. However, ice, a solid form of H2O floats on liquid water which means ice is less dense than water. What do you think is the reason for this phenomenon? What is the biological significance of this concept?

Which of the following statements about the BOD test is FALSE? A BOD test is a simple and practical indicator of the total organic content that is available to organisms plus any chemicals that spontaneously react with oxygen. B BOD test measures the oxygen consumed by microorganisms as they break down organic material There is an indirect correlation between the BOD5 value and the level of organic pollutants. The standard test for BOD is the five-day (BOD5) test carried out in the dark at 20 °C

A piece of news reported that Jenjarom, a town located in the Kuala Langat District, is now smothered in 17,000 tonnes (17mil kg) of plastic waste. There were 33 illegal factories in Kuala Langat, the district Jenjarom is located in. Some sprang up nearby dense palm oil plantations, whereas others were closer to town. The smell started a while ago but got worse around August this year. People in the town started to feel unwell and would keep coughing. These illegal recycling plants choose to dispose of plastic a cheaper way - either burying it or burning it causing fumes - so hazardous that some people even coughed up blood clots while some could not sleep at night because of the smelly air. Children were also affected, especially those who lived nearest to the factories in Jenjarom. There were reports some children developed really bad rashes around their stomach, neck, legs, and arms. Their skin would keep peeling, even when touched by people, and hurtful. The smell was far and wide…

5/6 >> 83% 85 min 06 secs A person is out on the beach for about 1 hour without sunscreen. The amount of UVA radiation hitting a surface at sea level on a slightly clouded day is about 80W/m2. About half of that can be absorbed by the skin. Estimate the number of C-C bonds broken in this person's back (about 0.24 m2) over that period. A typical carbon-carbon bond requires 348 kJ/mol to break. Assume that the average wavelength of UVA is 335 nm. Type your answer here:

Prompt 2- How can a new substance (a gas) be produced and the total mass of the closed system not change? 3-What are some symptoms you've experienced when you've been sick?

Kindly answer this question

TRUE OR FALSE 6-10 ONLY

-|· 4.0 H3C 3.0 Match the peaks in this spectrum with hydrogens on the structure below. A) I: 0.91 ppm II: 3.29 ppm III: 1.52 ppm IV: 3.23 ppm H₂ CH3 CH 2.0 CH3 IV ppm 1.0 B) I: 0.91 ppm II: 3.29 ppm III: 3.23 ppm IV: 1.52 ppm C) 1: 3.23 ppm II: 3.29 ppm

A discharge pipe releases small amounts of various alcohols from an industrial fermentation process into a lake. Local scientists would like to estimate the rate at which the alcohols are degrading in the lake. One of them, butanol (C4H9OH), is released to the lake at a rate of 20 kg/day. Butanol is measured in the lake water on several occasions at a concentration of 10-4 kg/m3; no butanol is detected in the inflowing stream. Average streamflow at the outlet of the lake is measured to be 3 x 104 m3/day. What is the magnitude of internal sinks of butanol? Assume there is not butanol exchange with the atmosphere.

K An oil company needs to fill orders for 91-octane gas, but only has 88- and 92-octane gas on hand. The octane rating is the percentage of isooctane in the standard fuel. How many liters of 88-octane gas should be mixed with 300 liters of 92-octane gasoline to get a mixture that is 91-octane gas? Let x be the amount of 88-octane gas used in the mixture. Complete the following chart. Type of Gas 88-octane 92-octane Mixture Quantity X 300 x+300 % Isooctane 88% 92% 91% Amount of Isooctane 0.91 (Simplify your answers. Use integers or decimals for any numbers in the expression.)

Write balanced equations for the reaction of Al(OH)g with stomach acid (HCI). Express your answer as a chemical equation. Identify all of the phases in your answer. | ΑΣφ ? Submit Request Answer Part B Write balanced equations for the reaction of Mg(OH), with stomach acid (HCI). Express your answer as a chemical equation. Identify all of the phases in your answer.

Rsimi, Nour 2023VVA Chemistry.7b.FA1 An unknown solid substance is heated according to the temperature versus time graph below. Temperature (°C) 70 40 30 20 288 8 2 0 0 5 15 Time (min) 20 00 4 of 5 1 2 3 4 5 25 While the substance is a liquid, at what temperature do the molecules of the substance have the greatest average kinetic energy? 2 % 3 4 5 16 7 8 insert

As you investigate the relationship of oil and plastic, add “zoom out boxes” to the images below. Each “zoom-out box” should provide a deep explanation of the relationship between oil, water bottles, and society. ( Use the images from the model )

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