3. The mass of a diamond is usually expressed in carats, where Useful conversion factors

Q: You are drying a sample of Ba3(PO4)2. After 5 minutes of drying it weighs 1.2034 g. You continue to…

A: Answer: Percent change in mass will be the ratio of change in mass with initial mass, therefore %…

Q: You add 8.34 grams of sodium bicarbonate in a test tube weighing 31.43 grams. After heating with a…

A:

Q: How are they alike? How are they different?

A:

Q: What is the difference in mass between a nickel that weighs 4.8 g and a nickel that weighs 4.8673 g?

A: Given,  Mass of nickel = 4.8…

Q: See What is the mass of a magnesium block that measures 3.00 cm x 5.00 cm x 2.00 cm? The density of…

A: Given that,Dimensions of a magnesium block = 5.00 cm x 2.00 cm x 3.00 cmThe density of magnesium is,…

Q: The molar mass of a compound was determined to be 23.99 g/mol. If the sample contains 3.2 mol, then…

A:

Q: Flubberium (Symbol Fb) has a atomic mass of 3.8 grams, Vibranium (Symbol Vi) has an atomic mass of…

A: Given Molar mass of flubberium (Fb)= 3.8g Molar mass of Vi = 5.2 g Percentage composition of Fb is…

Q: 3. If a student had access to a balance for this procedure, they would also be asked to weigh each…

A: • % Composition of A in mixture = Mass of AMass of Mixture x 100Given,Mass of Iron = 2.85g.Mass of…

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: This question can be solved using simple subtraction.

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

A: A balanced chemical equation contain equal number of atoms of each elements on both sides of the…

Q: A molecule has a mass of 4.65 x 10^-23 g. Provide two possible chemical formulas for such a…

A: Given  mass of 1 molecule = 4.65 x 10-23 g we know  mass of 1 molecule = 1 mole  1 mole = 6.022 x…

Q: Consider the following chemical reaction HCl (aq)  + HgNO3 (aq) à Hg2Cl2 (s) + HNO3 (aq) If 20.0…

A: Given data :  Mass of HCl = 20 g  Mass of HgNO3 = 30 g  Molar mass of HCl = 36.46 g .mol-  Molar…

Q: A normal saline drip is a NaCl solution that is isotonic to blood serum so that it does not affect…

A:

Q: Which accurately show the law of conservation of matter (mass)? A) when 2 oxygen molecules…

A: There is a mistake in the question. The mass of clay should be 12 gm before cutting it into two. I'm…

Q: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: Given: Aluminum

Q: Is 2 elements and 1 compound a combustion

A: Given: Two elements and one Compound is present for a combustion Reaction To find: whether the above…

Q: n. is the total mass of solid recovered? g is the percent composition of naphthalene in the initial…

A: A) 1.661gm B)21.06% C)15.73%

Q: In the SI system of units, the mole is one of seven base units. It is frequently used in chemical…

A: yes , mole should be considered as the SI unit. The mole is the basic unit of amount of substance in…

Q: Aluminum bronze contains 92.0% copper and 8.0% aluminum. What maximum mass of aluminum bronze can be…

A: Given: Aluminum bronze contains 92.0% copper and 8.0% aluminum.  Mass of Copper =73.5 g Mass of…

Q: A chemist has two different gasohol mixtures available. One contains 20% alcohol and the other 12%…

A:

Q: 100.0 g of lead(II) nitrate is reacted with 50.0 g of potassium iodide (in plenty of water). How…

A:

Q: The nickel is comprised of two metals, nickel and copper. Surprisingly, the coin is only 25% nickel.…

A: The coin is comprised of nickel and copper. The mass percentage of nickel in the coin is = 25% The…

Q: Escoja los reactivos necesarios para la siguiente síntesis: A Br OH A = Mg, THF B = PCC, CH2C12 C =…

A: Given cell diagram is :  Give the formulas of the reagents A, B and C = ?

Q: 5. Calculate molar mass of Cu3(PO4)2. Report to the correct significant figures and units.

A: Atomic mass: Copper = 63.54 gm/mole Phosphorus = 30.97 gm/mole Oxygen = 16 gm/mole One formula unit…

Q: How much nickel is contained in a nickel coin that is 8.33% (by weight) of nickel? Recall that a…

A: Shape of coin is cylindrical. Density of a substance is defined as the mass of substance per unit…

Q: determine the mass percent of napthalene, NaCl, and sand from the following data. Also determine the…

A: Given: Mass of Beaker1 is 45.845. Mass of Beaker1 and sample is 47.500 g. Mass of Beaker1 and sample…

Q: Emissions from the burning of fossil fuels are often reported as gigatons ( Gt ) of carbon. In a…

A: Given that : Amount of carbon emitted by China = 2.9 Gt Amount of carbon emitted by United States =…

Q: A goldsmith wants to change the composition of 10 g 18K red gold (75% gold and 25% copper) into 60%…

A: 10 g 18 K red gold contains 75% gold + 25% copper

Q: 6. Calculate The scientist repeats the experiment, burning a new sample of steel wool until it is…

A:

Q: example of a homogeneous mixture is:     2.65 g Citric acid (H3C6H5O4)     0.023 M KSCN (aq)…

A: An mixture which is made up of two or more different substances through physical combination.

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

A: Given : Mass of ore used = 1 ton = 1 X 106 g                                                (since 1…

Q: What are two precautions you must observe  when using the electronic balance?

A: The details presented are for the determing mass percent of oxygen in KClO3. The precautions to be…

Q: In a catalog you can buy sulfuric acid with 99.999% purity at a cost of 2,263.00 pesos for a 100 mL…

A: The question given, volume of sulfuric acid (V)= 100 ml, Density of this acid (d) = 1.84 g/ml And…

Q: In the combustion reaction between propane and oxygen gas, if 44.0 g of propane is burned in 160.0g…

A: According to the rule of conservation of mass, the total mass of the reactant equals the entire mass…

Q: C. Naphthalene, C1,Hg, the chemical used in mothballs, can be isolated from the naphtha fraction of…

A: Since the whole mass contain 10 molecules of naphthalene. In solid state they are stick together and…

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: Given that : Mass of original sample = 2.5429 g Mass of filter paper = 0.5662 g Mass of paper cup =…

Q: A 480-pound alloy (which is just a mixture of metals ) containing 30% silver was mixed with an alloy…

A: Mass of alloy with 30% silver = 480 pound Mass of alloy with 55% silver taken = x pound % silver in…

Q: A chemist has a 19.50g sample of drinking alcohol (ethyl alcohol). what is the volume ogf the…

A: The relationship between mass and volume is given below.

Q: A sample of ammonium carbonate (MM = 96.09 g/mol) was found to contain 7.6 x 1023 AMU of N. How many…

A:

Q: The boiling of water is aa. physical change because the water disappears.physical change because the…

A: The boiling of water is a physical or chemical change. (a) physical change because the water…

Q: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent…

A: First convert given mass in kg  into grams .

Q: In an experiment a student recovers 6.43 g of dry nickel after dissolving a 5.14 g nickel coin in…

A: Given that,  Weight of dry nickel recovered = 6.43 g Weight of Nickel coin dissolved in nitric acid…

Q: An unknown compound has the following chemical formula: Fe(NO3) where x stands for a whole number.…

A:

Q: A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 4.05 g…

A: Nitrogen  gas produced 4.05 g

Q: Another hydrated compound containing Sodium, Boron and Oxygen was investigated.  250.00 g of the…

A: When NawBxOy×Z H2O is heated, the water molecules attached are removed and then decomposed to give-…

Q: 22.00 g sample of nitric acid (HNO3) has a purity of 96.20% by mass. Calculate the following: the…

A:

Q: 1. A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a. Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: Now let's suppose it's your turn to be the professor. You want to write a question for your students…

A: Since we want the unknown to be toluene  Hence the data (pressure, temperature and volume) should be…

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.