535 HW Chap 1

Be sure to answer all parts. Enter your answer in scientific notation. Carry out the following calculation, paying special attention to significant figures, rounding, and units (J-joule, the SI unit of energy; mol = mole, the SI unit for amount of substance): (6.022 x 1023 atoms/mol) (4.68 x 10-18 J/atom)(1-2-3-2)=[25.051 Note that the numbers 1 and 3 in the last term are exact. x 10 J/mol

A(s)+3B(l)−⇀↽−2C(aq)+D(aq)A(s)+3B(l)↽−−⇀2C(aq)+D(aq) in terms of [A],[A], [B],[B], [C],[C], and [D],[D], as needed. Note that Kc,Kc, which is sometimes symbolized as Keq,Keq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, KcKc means the same thing as Keq.Keq. Kc=Kc=

Bleach is a strong and effective disinfectant, but it is readily inactivated in the presence of organic material. Its active ingredient, sodium hypochlorite, is effective in killing bacteria, fungi, and viruses, including the influenza virus. Diluted household bleach disinfects within 10–60 minutes contacttime is widely available at a low cost and may be recommended for surface disinfection in healthcare facilitiesWhy is it necessary to know the accurate proportion in mixing bleach and water in cleaning and disinfecting high-touch surfaces daily in household common areas like tables, hard-backed chairs, doorknobs, light switches, or phones?

CH₂-COOH Citric acid has the formula HO-C-COOH I CH₂-COOH CH2–CDD - Na* + HD-C-CDD- Na CH₂-COO- COO-Na A 25.0 mL sample of a concentrated citrus fruit cordial component (e.g. for lime juice), used in the food & drinks industry, was diluted to 250 mL in a graduated volumetric flask. A 25.0 mL sample of this diluted solution, required, on average, 22.5 mL of a standard 0.100 molar sodium hydroxide solution using phenolphthalein indicator for the titration end-point. A) 0.0075 Assuming all the acid in the cordial was citric acid, calculate the concentration of the acid in g/mL in the original solution. B) 0.576 D and is tribasic acid, forming the tri-sodium salt on complete neutralisation with sodium hydroxide. 1.44 0.00225

▾ Part A DA chemical reaction does not occur for this question When ethanol (C₂HO(aq)) is consumed, it reacts with oxygen gas (O₂) in the body to produce gaseous carbon dioxide and liquid water. Enter the balanced chemical equation for the reaction Express your answer as a chemical equation including phases. | ΑΣΦ Submit Previous Answers Request Answer x Incorrect: Try Again; 6 attempts remaining SARASER E Provide Feedback MAIKLIENT Next >

1 of 4 I Review | Constants | Periodic Tab Part A The goose has a mass of 24.8 lb (pounds) and is flying at 9.00 miles/h (miles per hour). What is the kinetic energy of the goose in joules? Enter your answer numerically in joules. View Available Hint(s) Π ΑΣΦ Submit Request Answer P Pearson nc. All rights reserved. | Terms of Use | Privacy Policy Permissions | Contact Us 1:05 PM 96% 2/26/202

Two students A and B performed a four-trail analysis for calcium content in a given sample. The results are shown in the following table: Trial 1 Trial 2 Trial 3 Trial 4 Student A 16.92% 16.90% 16.88% 16.91% Student B 18.30% 18.50% 18.60% 18.80% If the actual amount of calcium in the sample was 16.90%. Which of the following statements is correctly describing the work of the students? Select one: O a. Student B is less accurate and less precise than student B O b. Student B is more accurate but less precise than student B O c. Student B is more accurate and more precise than student B O d. Student B is less accurate but more precise than student B Next p

A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 74.3 ºC. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 ºC. What is her percent error?

LOOKCu johtre0406a@mischools.org Required Sodium reacts with Chlorine to produce Sodium Chloride (table salt). The 1 point reactant(s) are * Chlorine Sodium Sodium Chloride Sodium and Chlorine Matter that has a definite shape and a definite volume is a* 1 point solid liquid Plasma Gas Air is a mixture and not a compound. This is because

Alicia and Marie own a vacation home at the beach. During the year, they rented the house for 42 days (six weeks) at $975 per week and used it for personal use for 58 days. The total costs of maintaining the home are as follows: Mortgage interest Property taxes Insurance Utilities Repairs Depreciation Required: $ 4,540 870 1,455 3,455 1,985 5,840 a. What is the proper tax treatment of this information on their tax return using the Tax Court method? Note: Use 365 days in a year. Round your intermediate computations to 5 decimal places and final answers to nearest whole dollar value. Schedule E Income Mortgage interest $ 5,850 Schedule A 0 $ Property taxes Insurance Utilities EA 365 65 $ 4,540 870 + $ 611 $ 1,450 Repairs $ 835 0 Depreciation $ SA 2,457 0 Net income $ (1,776)

a Table: (This is an example of what your data table should look like.)   Pressure (kPa) Temperature (°C) Temperature (K) Constant, k(P / T or P•T) Ice water bath 91.58 2.4 275.55   Room temperature 96.54 21.1 294.25   Warm water 104.11 44.5 317.65   Boiling water 113.75 77.5 350.5   Calculations: One way to determine if a relationship is inverse or direct is to find a proportionality constant, k, from the data. If this relationship is direct, k = P/T. If it is inverse, k = P•T. Choose one of these formulas and calculate k for the pairs in your data table (divide or multiply the P and T values). Record the answers in the fourth column of the Data table.  How constant were the values for k you obtained in Question 4? Good data may show some minor variation, but the values for k should be relatively constant.  Comment on your calculated k values. Analysis Questions: What does temperature measure?   Look at your graph.  What type…

1) State your interpretation of the meaning of the slope for the first graph you prepared of Volume of Steel Nuts (mL) versus Number of Steel Nuts. Hint: Understanding the meaning of a slope involves several factors: the units which are a ratio of the y axis units over the x axis units, the interpretation of the slope as “number of the y axis units for every one of the x axis units” and the concept that constructing the best line or curve that follows the trend in the data is a sort of averaging of the random error throughout the data.

Answer questions 1 and 2 according to the data given. Dater Weight of cream i: 326 kỳ. Table shows some data obtained directly from Lactascan instrument. Fat % SNF % Lacto- density 27.32 30.23 Raw milk 4.15 7.97 Skim milk 0.08 8.26 Q1. Calculate fat percent of creamn A) 46 B) 28 (C) 3D D) 0.046 آدرما 396 100 x Q2. Calculate efficiency of the cream separator. A) 100% B98% C) 97% D) 96% E) 87.2% amount 2500 L E) 0.28

AHrxn AS rxn AGrxn AS universe >0 0 low T, 0 high T

1:39 1 Send a chat Be sure to answer all parts. Nitroglycerin (C;H;N3O9) is a powerful explosive. Its decomposition may be represented by 4C3H3N3O9 → 6N2 + 12CO, + 10H20 + O2 This reaction generates a large amount of heat and gaseous products. It is the sudden formation of these gases, together with their rapid expansion, that produces the explosion. ok (a) What is the maximum amount of O, in grams that can be obtained from 7.50 × 10² g of nt nitroglycerin? g ences (b) Calculate the percent yield in this reaction if the amount of O, generated is found to be 24.5 %

Part C F10 BO O 3.04 × 10³ 6.27 x 10-1 The dosage of quinine when a 145-lb adult takes a 200.-mg tablet is equivalent to ug drug per kg of body weight. ► View Available Hint(s) O 627 O 1.38 × 10³ P Pearson * Education Inc. All rights reserved. | Terms of Use Privacy Policy. Permissions Contact Us | Bb Home L End Insert ■ Review |- Constants | Periodic Table 1 2

A homogeneous mixture has non-uniformly distributed particles a uniform composition throughout not a uniform composition throughout more than one phase

L, Of the container from part 'c'. ILS) A 0.50-kilogram serving of milk has an energy content of 371 kcal. A 0.50-kilogram uVing of ground beef has an energy content of 1470 kcal. A 60.00-kilogram man drinks 0.50 kilograms of milk in two minutes. At the same time, his 60.00-kilogram identical twin brother eats 0.50 kilograms of ground beef in two minutes. Immediately after the food is consumed, is one brother heavier than the other? If so, identify the heavier brother and explain why he is heavier. If not, explain why neither brother is heavier.