4. A stack of 10 pennies weighing 26.55 grams is placed in a graduated cylinder containing water. The initial volume of water is 50.0 mL and the final volume of the water and pennies 53.3 mL. What is the density of ONE penny?

Q: Make a seperate schematic diagram from provided procedures in photos

A: The schematic diagram shows a diagrammatic representation of procedures used in an experiment making…

Q: How was the precipitate obtained after filtration?   By scraping from the filter paper and…

A: Filtration is used to separate an insoluble solid from a pure liquid or a solution

Q: 17. Which solvent mixture would be the most polar? a. 100% hexanes b. 90:10 hexanes/acetone c. 80:20…

A: The polarity of the mixture: Suppose a non-polar solvent is mixed with the polar solvent the…

Q: During boiling point determination, the temperature of the vapors is being measured and not that of…

A: The concept behind the answer is that the boiling point of a liquid is the temperature at which its…

Q: 3.Why is it dangerous to perform distillation on a closed (airtight) system?

A: The process distillation involves the conversion of a liquid into vapour that is subsequently…

Q: 6. The following substance is expected to have good solubility in which of the following solvent(s)?…

A: *Sodium benzoate is a sodium salt of benzoic acid. It soluble in water (62.7 gm per 100ml) to form…

Q: A sterile ophthalmic suspension contains 0.5% timolol maleate (m.w. 433). How many milligrams of the…

A: We have 0.5% w/v opthalmic solution. Solute here is timolol maleate. Mol mass of timolol maleate =…

Q: Sudies have revealed extremely high deposits of heavy metals and paryiculate matterin rivers ,…

A: Water consists of many impurities. But particulate matter and the heavy metals are very poisonous…

Q: Check all the TRUE statements on fractional distillation Select one or more: A boiling chip is…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: A sample of naphthalene is contamined with a small amount of anthracene. The melting point would be…

A: Melting point the temperature where the solid starts to melt. Melting point is measure in oC or oF.…

Q: Dissolve 1 g of acetaminophen d.s 30 to 40 mL of water. Add 1 mL of nitric acid plus 1 mL of silver…

A: The above test is limite test of chloride. Where a standard solution of chloride is taken and mixed…

Q: Answer these questions.

A: The objective of the question is to understand various aspects of the chemical reactions and…

Q: After a recrystallization, a pure substance will ideally appear as a network of Choose. Choose... .…

A: A network of crystals having similar structure and size appeared during the recrystallization.

Q: Please clearly label the following where they appear: pinacol, sulfuric acid, water, pinacolone,…

A: Pinacol is a 1,2-diol and the pinacolone is a ketone. The reaction pinacol with sulfuric acid…

Q: 1. Define melting point. 2. True or False. The meiting point of a pure compound is a characteristic…

A: 1. Any substance which has a definite mass and occupies a volume in space is known as matter. Matter…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.