The U.S. quarter (25 cents) has a mass of 5.67 g and is about 1.55 mm thick. How many quarters are in a stack that is 1.75 ft high? Put your answer in

Q: Aqueous hydrochloric acid  HCl  will react with solid sodium hydroxide  NaOH  to produce aqueous…

A: The balanced chemical equation for given reaction is as follows,

Q: if a 5.00 g ring of 14k gold has a 2.92 g of gold and the rest is copper, what is the percentage of…

A: Given that a 5.00 g of a 14k gold has a 2.92 g of gold and rest is copper. We have to find the…

Q: A sample of a pure aluminum halogen compound with a mass of 34.0 g contains 19.1 g of the unknown…

A: percent composition of halogen = mass of halogenmass of aluminium halogen * 100

Q: What is the mass in grams of 0.485 moles of barium (Ba)? Enter your answer in decimal form with…

A:

Q: A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 × 104º kg. Use this…

A: Avogadro’s number is the number of atom/molecules present in one mole of any substance. And one mole…

Q: The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. nickels…

A: By using the general conversion factor that 1mm = 0.00328084feet, the thickness of nickel coin in mm…

Q: Gaseous methane  CH4  will react with gaseous oxygen  O2  to produce gaseous carbon dioxide  CO2…

A:

Q: sample of lead has a mass of 0.490. Calculate the number of moles. Your answer should be rounded to…

A: Given mass=0.49g Molar mass =207 Mole= mass/molar mass Mole=0.49/207 Mole= 0.0023

Q: A balloon has a volume of 19.3 and 12.1 moles. The amount of moles decreases to 8.63. What is the…

A:

Q: The mass of the average boysenberry is 0.28 ounces. The average Tesla weighs 4900 lbs. If one were…

A: Given: mass of boysenberry = 0.28 ounces = 0.28 x 28.3495 g = 7.938 g mass of Tesla = 4900 lbs =…

Q: Liquid octane (CH3CH26CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide…

A: The reaction of octane with oxygen is given as  C8H18 + 12.5 O2 ----> 8 CO2 + 9 H2O Since moles…

Q: Calculate the number of hydrogen atoms in a 70.0 g sample of ammonia (NH3). Be sure your answer has…

A: Given: Mass of NH3 is 70.0 g Molar mass of NH3  is 17 g/mol Atoms in 1 mole is 6.022×1023  To find:…

Q: mass

A:

Q: A 1.0-inch segment of thread weighs 2.9 mg. What would be the mass, in g, of a full spool of thread…

A:

Q: g and a glass of water has a mass of 0.050 kg. An oxygen atom has a mass of 2.66 × 10 Use this…

A: Answer: Each mole of a specie has number of particles equal to Avogadro number whose value is equal…

Q: PART A: A solution of cough syrup contains 5.00% active ingredient by volume. If the total volume of…

A: Total volume of bottle = 74.0 mL active ingredients = 5.00%  So, mL of active ingredients = 74 x…

Q: How many atoms are contained in 4.1 g of carbon? How can you round this answer to 2 significant…

A: 1 mole of any substance contains 6.023×1023 atoms.1 moles of carbon atoms weigh 12 g.

Q: Calculate the number of grams of sodium in 1.20 g of each sodium-containing food additive. NaCl…

A:

Q: calculate the volume in cm3 of 1,555,738,322 ng of manganese. the density of manganese is 7.20 g/cm3

A:

Q: A  penny  weighs  2.507g  and  is  made  of  an alloy which  is  97.6%  zinc  and  2.4%  copper.…

A:

Q: You add 344 grams of NaCl to a container and then you add 565 grams of water to that same container.…

A: Given : Weight of NaCl = 344 g               Weight of water = 565 g

Q: A solution of 34.5% sulfuric acid by weight in water has a density of 1.26 g/mL. How many grams of…

A:

Q: you are filling up a helium ballon for a birthday party. the balloon already had 0.38 moles of…

A:

Q: Liquid octane CH3CH26CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide…

A: Given information is Liquid octane,  CH3(CH2)6CH3 react with gaseous oxygen, O2 to produce gaseous…

Q: Aqueous sulfuric acid (H₂SO₂) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A: Answer:Limiting reagent is the reactant that gets exhausted first in the chemical reaction and…

Q: Gaseous ethane (CH,CH,) will react with gaseous oxygen (0,) to produce gaseous carbon dioxide (CO,)…

A: Limiting reactant :-        The limiting reactant in a chemical reaction is a reactant that is…

Q: Gaseous ethane (CH,CH,) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂)…

A:

Q: Iron has a density of 7.87 g/mL. How much mass would a 12.3

A: mass (m)  per unit volume (v)  is called density (d) i.e       d = MV   units : g/mL   (or)   Kg/L

Q: You have been asked to compound 8 capsules of lithium sulfate, containing 6 mEq Li* per capsule. The…

A: Given,  1 capsule contains = 6 mEq of Li+  Molar mass of Li2SO4 = 109.9 g/mole Weight of 8 capsules…

Q: A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 × 1027 g. Use this information to…

A: Given: The mass of brick is 4.0 kg and the mass of the earth is 6.0 × 1027 g. To find: Moles of…

Q: Liquid octane (CH₂(CH₂) CH₂) will react with gaseous oxygen (0₂) to produce gaseous carbon dioxide…

A: Hexane reacts with oxygen to form carbon dioxide and water. The equation for the balanced chemical…

Q: How many grams of calcium nitrate contain 4.50 g of oxygen? Write your answer on the blank with the…

A: Using molar mass of calcium nitrate and oxygen in calcium nitrate we can solve this problem.

Q: Calculate the mass of 8.70 × 10³ mol of Mg(NO3)2 . Round your answer to 3 significant figures.

A: The unit for mass is grams (g) and molar mass is g/mol. To get the mass, the moles have to be…

Q: O Chemical Reactions Dilution 1/5 Bis A chemist must dilute 76.4 mL of 2.66 M aqueous sodium nitrate…

A: When we are diluting the solution by adding water we are not changing moles of solute so number of…

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.