What is the mass (in grams) of Zn(NO3)2 that contains 3.82 x 1023 N atoms? Note: Molar mass of Zn(NO3)2 is 189.4 g/mol ound your answer to three significant figures.

Q: Nature sample of vinegar

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Q: STARTING AMOUNT X What is the mass in grams of NaCN in 120.0 mL of a 2.40 x 105 M solution? ADD…

A: Given:Volume = 120.0 mL = 0.120 LConcentration = 2.40 × 10-5 M (mol/L)Molar mass of NaCN = 49.01…

Q: Sample ID NYC Tap Water Unknown A Unknown B Unknown C Unknown D

A:

Q: QUESTION 11 The following are used as primary standards for NaOH EXCEPT O sulfamic acid sodium…

A:

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Q: The Kw of water (10-14) is a constant. What does this imply about the relationship between [H+] and…

A: Autoionization of Water - It is the dissociation of a water molecule to form H+ and OH- ions.

Q: Complete the table by computing HCl used, Normality of HCl, and Avergae normality of HCl. The givens…

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Q: 31.A child weighing 22 Ibs comes into the clinic with an ear infection. The doctor prescribes the…

A: We would solve it using dimensional analysis method.

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A: Answer: In this problem price of 1 bottle of acetaminophen, which contains 100 tablets each…

Q: what is a chemical reason that a sample could have less than 100% purity? A) Impurity was an acid B)…

A: percent purity = mass of the pure sampletotal mass of the sample x 100Percentage purity should be…

Q: Examen 1. Convierta 15.5 kg a mg. Recuerde que k = 1 x 10^3; y m = 1 x 10^-3. Select one: a. 155 mg…

A: Kilogram (kg), gram (g), and milligram (mg) are related as,1 kg = 103 g1 mg = 10-3 g

Q: From the following formula of an ointment, calculate the grams of zinc oxide required to make 100 g…

A: We have find out the grams of zinc oxide required to make 100 gm of ointment.

Q: Data of Candy (first trial) Mass of candy: 6.1115g Concentration of NaOH (M): 0.09639 Volume of NaOH…

A: Given: Trial 1: Volume of NaOH solution used = 17.2 mL. Trail 2: Volume of NaOH used = 17.2 mL.

Q: Prior to using any essential oil, a skin test is recommended. This can be done by diluting _____…

A: Prior to using any essential oil, a skin test is recommended. This can be done by diluting 1 drop of…

Q: Please don't provide handwritten solution...

A: Nitroglycerin ER is a medication used to prevent chest pain (angina) in people with a certain heart…

Q: 18. A 1.25 mol/L solution of sodium hydroxide, NaOH(aq), was used to titrate a 10.0 mL sample of…

A: Since you have posted multiple questions, we will provide the solution only to the first question…

Q: RMR (kcal/day) = (9.99 x 79.5kg) + (6.25 X 182.9cm) - (4.92 x 35) + (166 x 1)- 161

A: RMR is the resting metabolic rate. It is the amount of energy in calories burnt while resting and it…

Q: 50 g of NaCl has been dissolved in water to come up with a 120 mL of solution. The saline solution…

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Q: Use the exponent (EE) functionality on your calculator to do these calculations (a & c should be…

A: Significant figures of the answer will be two significant figures as the questions have .

Q: What is the Kw of a 0.00018 M hydrochloric acid solution?     1.8 X 10-4     3.74     1.0 X…

A: equilibrium constant is defined as products concentration divided by reactent concentration to the…

Q: What volume of solution (100ug/ml) will be administered to a rat weighing 150g, if the required…

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Q: Concentration (mg/ml) Time (min) 8.5 0.5 6.8 1 5.4 1.5 4.0 2 3.2 2.5 2.5 3 What will be the slope of…

A: Concept used: Slope = (Y2 - Y1)/ (X2 - X1) y = mx + c

Q: What is the [H*] with a pH of 7.5? (T/I) 1.3 x 10-5 M 3.1 x 108 M O 1.8 x 10² M 2.6 x 107 M 4.1 x…

A: Here we have to calculate concentration of H+ ion in pH of 7.5 solution-

Q: From the water, lemon juice, apple juice, diluted vitamin C and vinegar in the bowls respectively;…

A:

Q: 5. If the stock solution of tyrosine is 1.0 mg/ml and the working solution is 0.5 mg/L, how much…

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Q: An average individual drinks 3 L/day of water (daily) containing 0.2 mg/L of contaminant A (with…

A: The answer is attached below  Option E is the answer

Q: Na* levels: 118 mEq/liter (normal: 136-145 mEq/liter) K* levels: 2.4 mEq/liter (normal: 3.5-5.0…

A: This data is showing the concentration of Na+, K+ , Cl- ions in the blood of a person and also the…

Q: colonoscopy

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Q: The blood of a reckless driver contains 0.10% alcohol. The concentration of alcohol is equivalent to…

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Q: The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin an expectorant drug…

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Q: Broken glasses are the biggest (10 physical hazard causes laboratory .accidents True False…

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Q: Question 10 How would you generalize the dissolved oxygen content in your sample if the water sample…

A: A multiple choice question based on environmental pollution that is to be accomplished.

Q: 16. A physician orders that a child should be given potassium chloride milliequivalents per kilogram…

A: A physician orders that a child should be given potassium chloride (KCl) 1.6 milliequivalents per…

Q: When using eucalyptus essential oil on children, it should be: (Select all that apply.) Choose at…

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Q: NH,NO, O (2 N2 H,0 11. _N H_

A: The chemical equations should be balanced in accordance with the law of conservation of mass. This…

Q: normal range of serum glucose is 90-110 mg/dl, express this in mmol/L

A: The normal range of serum glucose is (4.99 - 6.11) mmol/L.

Q: Experimental Observation: Determine your unknown's position within the six standard solutions.…

A: To identify the position of the unknown among the 6 standard solutions. This is based on…

Q: 4. Identify any outliers on your graph that do not follow the pattern of the other data.

A: For drawing a graph firstly we will mark all the points we have. Then we will join the points…

Q: Use the following ABG Normal Values for the following question. HCO3 22 to 26 mEq/L PaCO2 - 35 to 45…

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Q: Weighted average if these values Value-7.00, 8.00, 9.00 Weight-75.0%, 15.0%, 10.0%

A:

Q: O Pure water O Weak acid Weak base Strong base

A: Electrochemistry deals with various kinds of cells used and redox reactions happening inside them.…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.