QUESTION 1 An aqueous solution containing 23.4 g of an unknown substance in 755 g water was found to have a freezing point of -1.96 °C. Calculate the molar mass of the unknown substance (Kf for water is 1.86 °C/m)

Q: Administration of digitalis, a drug used to control atrial fibrillation in heart patients, must be…

A:

Q: -xt Nunito Sans BIUA 三 三▼三▼三三 11 7. Complete the table below. Use the information given to find all…

A: pH = - log[H+] pOH = - log[OH-] pH + pOH =14 These formulas are used for filling the above chart.

Q: Calcium metal is dropped into water. The products are calcium hydroxide and hydrogen gas.

A: The balanced equation, total ionic equation and net ionic equation of the reaction has to be…

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Q: What is value for x in the equation below? e(3.66x) = 101.8(8.90+1.04) %3D Note: Logarithms and…

A:

Q: 13. The speed of a particular automobile is 45 mph (miles per hour). Use the following relationships…

A: In this question we have to convert the unit of speed.

Q: A 76.0076.00 pound flask of mercury costs $143.50.$143.50. The density of mercury is 13.534…

A: 76.00 pound of mercury costs $143.50 Therefore, 1 pound of mercury costs 143.50 / 76 = $1.89

Q: How do I solve Fahrenheit equals 1.8 (C) +32

A: The formulas for converting between degree Celsius and degree Fahrenheit are:°F = (°C * 9/5) + 32°C…

Q: n=? O PVIRT O TR/PV O PT/RV O PR/VT

A:

Q: A 76.0076.00 pound flask of mercury costs $147.50.$147.50. The density of mercury is 13.534…

A: since you have posted a question with multiple subparts, we are entitiled to answer only firsr 3…

Q: 1. A friend claims that a metric ton is more than twice the mass of an English ton because a…

A: 1. A friend claims that a metric ton is more than twice the mass of an English ton because a…

Q: || || من هم أحياة Drawing .

A: we have to draw the product of the given reaction.

Q: (2.08 x 105)(7.0 x 10-5) =

A: In this question, the multiplication result of the two numbers has to be determined. Let first…

Q: Food safety guidelines recommend that a beef rib roast (bone-in) should cook for 23.0 minutes per…

A: beef rib roast (bone-in) should cook for 23.0 minutes per pound based on a 325 °F oven setting…

Q: 1-38. To entertain children between the ages of 2 and 90, I enjoy popping corks from bottles…

A: (a) The formula mass of acetic acid and sodium bicarbonate is

Q: 21. The recommended daily allowance of thiamine is 1.4 mg per day. A patient is consuming 0.80 mg.…

A:

Q: Percent Error is defined as: % = [measured value – accepted value] / measured value x 100

A: Percent error is used to get an idea about the possible error in the experiment based on the known…

Q: The average heart beats 74 times per minute. How many times will the heart beat in 6.4 days?

A:

Q: Which of the statements below are true of the substance represented in the diagram?

A: Among solid, liquid, and gas, the arrangement of atoms are different. The particles in a solid are…

Q: How many significant figures would this calculation have if it were completed: (9.04-8.23 +21.954…

A:

Q: An adult should have no more than 23032303 mg of sodium per day. What is this limit in kilograms…

A: Given: Mass of sodium = 23032303 mg   Conversion of mass of sodium from mg to kg: 1 mg = 10-6 kg

Q: O Macmillan Learning One important test for kidney disease involves measuring the levels of…

A: Answer :----

Q: How many nL are there in (3.67x10^3) cL

A:

Q: -shaped tube containing an amount of mercury. The left arm of the tube has cross-sectional area A1…

A: Solution: Part(a) Given that Cross section of left arm A₁=10.9 cm² Cross section of right arm…

Q: CI OH

A: 2-chloropropan-1-ol

Q: What is substance examples?

A: To define: A substance.

Q: 1 10J 1 MJ 1 m J = = 11 = 10 -1, 10 3 10 0 J J 100 J w by filling in the missing prefix μ X

A: Energy is represented in terms of joule(J). Different representation of unit of energy: Decijoule…

Q: 1. What is the approximate population for: a. The world: b. China: Population Math Practice c.…

A: 1) The approximate population of  a) World: 8 billion b) China: 1.426 billion c) India: 1.417…

Q: A B D B Bu с NaOH D E

A: Strong base react with alpha hydrogen containing carbonyl compound to give an enolate ion is as…

Q: a = -bcd In order to solve the equation above for d, you must multiply both sides of the equation by…

A: To solve these equations we need to check both the sides.

Q: Identify the following as a physical or chemical change: (a) water boils at 212 °F (b) applying an…

A: Physical changes: These changes involve a change in the physical properties of a substance…

Q: Without using a calculator, decide which would give a significantly smaller value than 8.83 x 10-2,…

A:

Q: What is 302 x 4903

A: Calculate 302 × 4903

Q: Calculate the electrostatic force of repulsion for two protons separated by 93.0 pm. The charge of a…

A: given that , The charge of proton is 1.6x10^-19 C Distance between two proton is 93.0 pm = 93x10^-12…

Q: a) An acetaminophen suspension for infants contains 80 mg/ 0.80 mL suspension. The recommended…

A: Given, a. The concentration of an acetaminophen suspension = 80 mg/ 0.80 mL The dosage of drug based…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.