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: 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: Which of the following are common coagulants? Several correct answers Group of answer choices iron…

A: The substance which caused another liquid coagulate of substance is called as coagulant. Coagulation…

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: The cost of a bottle of Extra Strength Tylenol is $9.99 for 100 tablets each containing 500 mg of…

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

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: 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: 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…

A: Answer: Volume of the solution that will be administered is 150 mL. Given  Density of the…

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

A:

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

A: It is based on  the concept of concentration Here  we are requires to find  the volume of  the cough…

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…

A: Eucalyptus oil is obtained from the leaves of eucalyptus trees. It is used in medicines as a perfume…

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

A:

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.