CHBE 2100 Exam 2 Fall 2019

please answer the questions 1 and 2 shown below, show work and answer correctly making sure that its right. answer quickly please. (this problem deals with acids and bases and you should include a calculator,)   1. H+= 1.10^-1 = PH   2.) Ph=4.93 = [H+]

Please answer all the questions !!!

BASIC PURE SUBSTANCE MIXTURE UNIT DESCRIPTION (color; physical state; transparent/translucent/opaque; shiny/dull malleable/ductile, shape and size of particles for solids; odor for organic series only) SAMPLE OF Соmpound (for Pure substances Element MATTER only) Homo- Hetero- atom, molecule, or formula unit Metal Nonmetal Ionic Covalent Series 8. ORGANIC CHEMICALS C,H14(1) Нехane HC,H3O2(aq) C4H3O2(1) ethyl acetate C;H60(1) Acetone CH,O(1) ethyl alcohol (ethanol) C10H3O(s) 1-naphthol C;H,O(1) Benzaldehyde C3H3O2(1) methyl benzoate C,H§O(I) trans-cinnamaldehyde

I need help with these questions (Not honor class) (Not grading)

I need answering these questions and using model 1 (Not honor class) (Not grading)

THIS CAN NOT BE HAND DRAWN!

I need help with these questions and using the model 1 (Not honor class) (Not grading)

Hi! Can someone answer Learning Task 4, no. 1? Thanks!

Write your complete solutions on yellow paper, round your answers to the appropriate number of significant figures, and box the final answer. The deadline for submission is at the end of the class. Note: You do not need to write your solutions for the items that can be derived from your calculators. 1. Three students (Saerom, Hayoung, and Jiwon) are asked to determine the ppm Ca in a drinking water sample by titration with EDTA. Each student performed five trials for the sample. The results in ppm Ca are the following: Saerom Hayoung Jiwon a. Get the mean, SD, and % RSD of each student's results. b. If the true value is 35 ppm, calculate the relative error of each student's results. c. Comment on the precision and accuracy of each student's results. The maximum % RSD and the relative error set by the lab is 5.0%. d. Use the following table to summarize your answers. Mean SD %RSD Relative Error Comment 31, 32, 33, 33, 32 35, 34, 34, 35, 34 35, 38, 33, 35, 37 Saerom Mean SD 95% CI…

please highlight the correct answer

I'm resending this question because the image on the last one was blurry. I wrote the prompt and steps and helpful conversions to figuring out the real world problem on my scratch paper, how do I solve for this problem?

Carbonate ions can be converted to bicarbonate ions by an acid-base reaction with water. Fill in the missing ions in the acid-base reaction of a carbonate ion with water below. Make sure the equation is balanced.  Write the net ionic equation (enter each dissociated ion in its own response box). Do not include any phase designations of reactants or products in your answer. Do not include any coefficients of 1

Why do you need to study chemistry? How is it applicable to your course which is Criminology? In ten (10) sentences.

D Chemical Reactior x dochu.com/tyan Chemical Reactions Lab.pdf Last saved 20 hours ago Upgrade to Pro V- a Slgn 3. Methane (CHa) or natural gas is a coloriess, odorless gas. Chemical companies add a chemical that gives off a distinctive odor with the gas. This is the reason we seem that rotten egg smell when it is leaking. Why is this necessary?

doug began preparing laboratory surface disinfectant from chlorine bleach. he put on a chemical resistant apron and gloves and then removed the bleach container from the special chemical cabinet. he carefully placed the container on the laboratory benchtop and began to add the chlorine bleach to distilled water. nearby workers began complaining of burning eyes. doug was reprimanded by the supervisor. Explain why.

Which diagram is the correct one?  What other procedure can be used to solve this problem? write down ways to solve.  first, execute plan 1 to solve the problem. Please explain every step.  Think about the way that you can use to make sure that your answer makes sense. write down your assessment.

Retype each equation into the adjacent box. Use the X' button for superscripts and the X, button for subscripts. Use the right and left arrow keys on your keyboard to get out of either the superscript or the subscript mode. 2Na + Cl, 2NaCl L(s) + 2e 21¯(aq) W étv 26 MacBook Air DII DD F12 F11 F10 F9 80 F8 F7 F6 F5 F3 F4 * & dele %23 $ 9 く

3 Chemical reactions don't just happen in the lab. Discuss two or more Redox reactions which are important in the real world, and why they are important. Make sure to include a balanced chemical equation and a short description for how and where this reaction occurs. Answer in at least 200 words.

FINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acer

1. Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow. Be sure to include the proper phases for all species within the reaction. Cu₂SO (aq) + Na₂PO₂(aq) → 2. 3. Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow. Be sure to include the proper phases for all species within the reaction. Ba(CIO)₂(aq) + RbOH(aq) → Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow. Be sure to include the proper phases for all species within the reaction. ZnCl₂(aq) + Hg₂(NO³)₂(aq) —

Name the following Fe(NO3)2

Predict what will be observed in each experiment below. predicted observation (choose one) experiment Rock candy is formed when excess sugar is dissolved in hot water followed by crystallization. A student wants to make two batches of rock candy. He finds an unopened box of "cane sugar" in the pantry. He starts preparing batch A by dissolving sugar in 500 mL of hot water It is likely that more rock candy will be formed in batch A. It is likely that less rock candy will be formed in batch A. (70 °C). He keeps adding sugar until no more sugar It is likely that no rock candy will be formed in either batch. dissolves in the hot water. He cools the solution to room temperature. He prepares batch B by dissolving sugar in 500 mL of water at room temperature until no more sugar is dissolved. He lets the solution sit at room temperature. I need more information to predict which batch is more likely to form rock candy.

Write out the recipe and list all the ingredients (including the measures) of your favorite dish. Your recipe must not be the same as another post. If your favorite dish has already been posted, then choose another recipe. Explain how the ingredients in this recipe cause a chemical reaction. Ask ONE (1) clarifying question about a topic you find difficult or want to learn more about from the concepts introduced in this module. In your response to your peer’s posts, locate a resource that may help address the clarifying question regarding the genetic topic in the initial post.

Use the information below to answer questions 1- 3. PCI,(g) 2 PCI;(g) + Cl2(8) PCI,(g) decomposes into PCI,(g) and Cl,(8) according to the equation above. A pure sample of PCI,(g) is placed in a rigid, evacuated 1.00 L container. The initial pressure of the PCI5(g) is 1.00 atm. The temperature is held constant until the PCI,(g) reaches equilibrium with its decomposition products. The figures below show the initial and equilibrium conditions of the system. PCI5 Potal = 1.00 atm PCI5, PCI3, and CI, Prstal = 1.40 atm Figure 1: Initial Figure 2: Equilibrium As the reaction progresses toward equilibrium, the rate of the forward reaction (A) increases until it becomes the same as the reverse reaction rate at equilibrium (B) stays constant before and after equilibrium is reached (C) decreases to become a constant nonzero rate at equilibrium (D) decreases to become zero at equilibrium If the decomposition reaction were to go to completion, the total pressure in the container would be (A) 1.4…

Balance each of the following neutralization reactions. Part A HNO, (aq) + Sr(OH)2(s)→H20(1) + Sr(NOs)2(aq) Express your answer as a chemical equation. Identify all of the phases In your answer. ΑΣφ ? DA chemical reaction does not occur for this question. Submit Request Answer t Speec.pdf

A docs.google.com The Progressive Era Camila Vasquez - American 2 Vir.. Chapter 8 Test When solutions of potassium sulfide and copper(II) chloride are combined, a solid is formed. What type of reaction is this? * production of a gas neutralization precipitation When solid calcium carbonate is added to sulfuric acid, water, carbon dioxide gas, and solid calcium sulfate is formed. What type of reaction is this (check all that apply). * precipitation production of a gas neutralization When solutions,of potassium sulfide and copper(II) chloride are combined, a solid is formed. Write a balanced reaction equation. Your answer MacBook Air

Quickly please please please i need help in 15 minutes please

None

Please answer the following question:

Please help me.......

Explain your reasoning, please. Thank you.

Answer questions 3 and 4

Mixtures and Pure Substances Lab Data Sheet Discussion Questions: In the space provided for each question, type your response. Be sure to write complete sentences for your responses as well as use proper grammar and punctuation. Submit your lab data sheet as docx or pdf file in Canvas. 1.Classify the salt and pepper mixture. Click or tap here to enter text. 2.Why did you add water to the salt and pepper mixture? Click or tap here to enter text. 3.Classify the types of mixtures formed from the salt, pepper and water. Click or tap here to enter text. 4.What is the physical method used to separate the salt water from the pepper? Click or tap here to enter text. 5.What is the physical method used to separate the salt from water? Click or tap here to enter text. 6.What physical property is different in salt and water? Click or tap here to enter text. 7.What are the types of pure substances present in the salt solution? Click or tap here to enter text.