Many metals react with oxygen gas to form the metal oxide. For example, calcium reacts as follows: 2Ca(s) +O2 (g) →2CaO(s) [molar mass of Ca = 40 g/mol] You wish to calculate the mass (g) of calcium oxide that can be prepared from 4.20 g of Ca and 2.80 g of O2. (a) What amount (mol) of CaO can be produced from the given mass of Ca? (b) What amount (mol) of CaO can be produced from the given mass of O2? (c) Which is the limiting reactant? (d) How many grams of CaO can be produced?

Q: A chemistry teacher needs 60 ounces of a solution of 30% hy drochloric acid (HCI) to carry out an…

A: The question is based on the concepts of solutions. we have been given certain solutions.  using…

Q: How Are Solution Concentrations Measured?

A: Concentration of solution defines amount of chemical species such as solute present in per amount of…

Q: Compute for the volume/weight to make calcium hydroxide 80 ml solution Calcium hydroxide-? Purified…

A: The dissolution of a solid substance in an appropriate solvent furnishes a solution. The amount of…

Q: is calcium carbonate a basic sodium salt?

A: Given: Is calcium carbonate a basic sodium salt?

Q: write a step by step procedure to make 500 ml of a 0.125M lithium oxide solution?

A: For this we have to find the grams of Li2O (lithium oxide) require to dissolve in 500 ml of water to…

Q: 7 amu, contai toms contain as an atomiCI

A:

Q: Hemoglobin is an example of where the prosthetic group is DA. chromoprotein, iron-bound porphyrin…

A: Hemoglobin is the protein in red blood cells that helps in oxygen transfer between the lungs and…

Q: Give an example of a primery standerd solution :Select one a. Hydrochloric acid b. Sodium hydroxide…

A: A primary standard is a standard that is sufficiently accurate such that it is not calibrated by…

Q: 4. Calculate the volume of alcohol to be added to preserve the prescriptio below. Rx Active drug'…

A: The objective of this question is to calculate the volume of alcohol to be added to preserve the…

Q: need the the step by step solution     What is the volume in cubic meter of a 2 pound water?

A: Now here we need to do the unit conversion that is from pounds to cubic meter  Now  1 pound =…

Q: It says the solution is incorrect

A: Given that, for carbon-11 The half-life is t1/2 = 20.3 min. The initial amount is N0 = 1×107 atoms.…

Q: What volume in mL of 0.100 M solution would contain 65 mg of ethanol? Report your answer in standard…

A:

Q: 6. How many mL of 6M HCI solution should be diluted to make 200 mL of a 1.5M solution?

A: For dilute solutions,  M1 x  V1  =  M2  x  V2 where M1 is the initial concentration, V1 is the…

Q: theory of experience Solution Preparation (Solid State)

A: Solution is defined as a mixture of solute and solvent (water). When we mix solute like sugar or…

Q: stion 1 B ALL A C D OH НО. 5 points E Arrange the following compound based on decreasing water…

A: Solubility of organic compound in water is dependent on how they interact with water. Generally…

Q: Which of the following is not a common water quality parameter? A. dissolved oxygen B. biochemical…

A: Water quality assessment is the process of evaluating numerous physical, chemical, and biological…

Q: How many clarification of water. O Three. O Two. O Four.

A: The types of water clarifiers  is given below

Q: What happens to the concentration of a solution when solvent is added to it? Group of answer choices…

A: Concentration of a solution depends upon 2 main components of solution: 1. Solute 2.Solvent   When…

Q: ty of solvent?

A: The elevation in boiling point is directly proportional to Van’t-Hoff factor and molality of the…

Q: No. of grams of 500 ml solution of 2000 ppm NaCl is 1000 2,

A: Given that  Concentration of NaCl solution = 2000ppm Volume of solution = 500mL = (500mL×1L/1000mL)…

Q: Comparison of Henry's Law. Roult's Law Konwalov Base

A: Answer: Henry's law state that the weight of a gas dissolved by a liquid is proportional to the…

Q: Daite 25 Compounds (oswmatre t aroonatict alpate) ueith lorgeet and alzo grue yer chemical whift…

A: if shielded low chemical shift value . if Deshielded high chemical shift value

Q: Compute the mass of KI needed to prepare 500 mL of a 0.750 M solution.

A: Molarity=0.750Mvolume=500mLmolar mass of KI=166g/molmass of KI=?

Q: ......Can be used to differentiate between ethanol and phenol (a) Iron IIl chloride solution (b)…

A: Introduction: Ethanol is an aliphatic compound and phenol is an aromatic compound. Ethanol and…

Q: These are samples of about the same size that are carried through an analysis in exactly the same…

A:

Q: Solve the following: a. A lab technician needs to prepare 500 mL of 0.18 M sodium hydroxide…

A: a) we have to calculate mass of NaOH needed in grams  b) we have to calculate the volume of…

Q: e molarity of the acetic acid solution?

A: Acetic acid is a weak acid and KOH is a strong base. In acid base neutralization reaction occurs…

Q: Compute the mass of KI needed to prepare 500 mL of a 0.750 M solution. Show your work.

A:

Q: How do I calculate the average value from my value and the two other students value ? my value is…

A:

Q: 2.Boils at temperature higher than the boiling point of pure solvent A.Vapor Pressure B. Boiling…

A:

Q: Part A & b and why in part A with this solution decrease in volume

A: In osmosis, the solvent molecules (water molecules) move across the membrane from the solution…

Q: A B Solubility C

A: Solution is a homogeneous mixture of two or more compounds. The compound which is in small quantity…

Q: how do you what significant figure to round it up after completing the solution

A: Average molecular weight of an atom(M) = f1m1 + f2m2           Where f1 and f2 are fractions of the…

Q: Derive the equivalent expression of ppm in mg/L

A: The objective of the question is to derive the expression where ppm is converted into mg/L

Q: for what purpose is the developing solvent used? Explain in 1-3 sentence only.

A: Developing solvent is the mobile phase used to separate components in chromatography.

Q: Draw a particle diagram for the soluble salt NH4Br. Don’t forget to include water! Then describe in…

A: Answer is explained below.  The particle diagram for the soluble salt NH4Br is as follows:

Q: As the temperature of a solution increases, the solubility of salts____and the solubility of…

A: temperature is one of the factor effecting on solubility if change in temperature solubulity may…

Q: Why do true solutions not show Tyndall effect?

A: Tyndall effect is the dispersion of particles by light and its often used to differentiate the true…

Q: A. Solubility and Salt Formation (Dissociation & Neutralization) Obtain 4 clean test tubes. Test…

A: Acid and base reacts with each other and salt Is firmed

Q: In lab you are required to make 250.0 mL of a 1.1 M NaOH solution. How many grams of NaOH should you…

A:

Q: Write a step by step procedure to make 500ml of a 0.125 lithium oxide solution. Be sure to include…

A: Answer :-  To prepare 500 ml 0.125 M lithium oxide (Li2O) solution, dissolve 1.863 g lithium oxide…

Q: 29) The molecular interaction called “hydrophobic effect" is best described as: A) The attractive…

A: Hydrophobic effect is best described as:

Q: Show solution on how many milligrams there are in 25 nanograms

A: Given -> 25 nanogram

Q: The molarity and normality of a diprotic acid is the same. True False

A: Normality = n × molarity  n= basicity of acid

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.