Cu20(s) -170.7 92.4 CuO(s) -156.1 42.6 Cu(s) 33.2

Q: A college chemistry student is performing this reaction in a lab, where magnesium is burned and…

A: When a reaction occurs,  reaction occurs in stoichiometry amounts.  Product is formed with respect…

Q: A sample of an iron alloy contains 89.4 g Fe, 2.50 g C, and 1.47 g Cr. Calculate the percent by mass…

A: Given :-  Mass of Fe = 89.4 g  Mass of C = 2.50 g  Mass of Cr = 1.47 g  To calculate :-  Percent by…

Q: A chemist fills a reaction vessel with 7.21 atm nitrogen (N,) gas, 6.92 atm hydrogen (H,) gas, and…

A: Given  Temperature = 25°C = 298°K The formation values are taken from the table given.

Q: We have 40.5 cm of a material. How many g is it? The material has density of 9.50 g/cm O 68.0 g O…

A: • The values provided in the question are:-  i) Density of a material, d = 9.50 g/cm3  ii) Volume…

Q: Zinc (Zn) Zn Copper (Cu) Cu 9.59 g mass The ammeter completed the run time for this experiment.…

A: A question based on mole concept that is to be accomplished.

Q: Magnesium nitride is used in the preparation of certain ceramic materials and the manufacture of…

A: 3 Mg (s) + N2 (g) → Mg3 N2 (s) mass of Mg = 12.7 g Actual Mass of Mg3N2 produced = 8.54 g

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: The amount of solute which is dissolved in given amount of solvent is known as concentration.

Q: Which of the following metals is least chemically reactive?  potassium  sodium  iron  magnesium…

A: The reactivity of s block metals are very high due to presence of just either 1 or 2 electrons in…

Q: P4(9) + 6CI2(g) –→ 4PCI3(g) 8.02 L of P4(g) is mixed with 10.4 L of Cl2(g) and reacts with 100%…

A: % Yield = 100 %  Volume of P4 (g) = 8.02 L  Volume of Cl2 (g) = 10.4 L As, 22.4 L of gas contains 1…

Q: Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions…

A:

Q: A sample of air, with a mass of 5.0 kg, contained carbon monoxide with a concentration of 12 parts…

A: We have given that  A sample of air with a mass of 5.0 kg, contained carbon monoxide with a…

Q: You are working in the laboratory and are testing the salinity of ocean water in various areas along…

A: Mass %ge of a component may be calculated by dividing the mass of that component with the volume of…

Q: balanced chemical equation in

A: We know the definition of the single displacement, double displacement reaction, decomposition,…

Q: A sample of an ethanol-water solution has a volume of 54.4 cm^3 and a mass of 49.9 g. What is the…

A: The mass of ethanol is - Mass = density×volume Mass = 0.789×54.4 Mass = 42.9216 gram   Then, total…

Q: themist prepares a solution of potassium chloride (KCl) by measuring out 43. mg of KCl into a 50. mL…

A:

Q: A sample of 18.11 grams of sodium hydroxide is weighed out on a balance and prepared to a volume of…

A: Given: The mass of NaOH dissolved = 18.11 grams The volume of the solution = 2.00 x 102 mL We have…

Q: hich metal is the best conductor of electricity? Choose from the choices below: Gold…

A: The answer of this question is given in step 2

Q: Fill in the Blanks Chemical Price/kg (in dollars) NaOH 21.17 CaCl2 41.28 КОН 31.38 CuSO4 93.32…

A: Solution is provided in the image below.

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: It is given that,       Initial concentration of salt dissolved in        Lake…

Q: A K 0.8 0.8 Ba cs/0.9 0.7 0.9 Na 0.96 ST RD 1.06 12 1.06 1.2 Ca/1.31 Y 1.21 Mg La 1.1/1.3 2.1 N Be V…

A: Given :-  The given interatomic bond is Ga-P  From diagram we have,  Electronegativity of Ga = χGa=…

Q: d) Which of the following substances can be considered chemically pure? • Brass ● ● Seawater Air…

A: Given 5 substances • Brass , • Seawater ,  • Air , • Apple juice  ,    • A bar of 24-karat gold We…

Q: A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 2.3g of MgCl2 into a…

A: The solubility of MgCl2 in the water at normal conditions is very high, so 2.3 g of MgCl2 is…

Q: A chemistry student must write down in her lab notebook the concentration of a solution of sodium…

A: Answer

Q: Suppose you need 6.0 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to…

A:

Q: tablet of Mylanta antacid contains 0.300 g Mg(OH)2 and 0.200 g Al(OH)3. For the blanks in this…

A: Mass of Mg(OH)2 = 0.300 g  Mass of Al(OH)3 = 0.200 g

Q: Which of the following used to be more precious than gold or silver, due to difficulties in refining…

A: The metal that was more precious than gold or silver due to difficulty in refining it was Aluminum…

Q: What charge would exist on chlorine (#17) after it reacts with a rubidium atom (#37)?

A: We would check electronegativity values of determine the charge.

Q: The legal limit for chromium in drinking water is 0.10 ppm. What is the maximum permissible mass of…

A:

Q: Use the data listed in the supporting materials to calculate the equilibrium constant, Kp, for the…

A:

Q: Assuming that the copper and lead are pure, determine the relative amounts of each kind of BB. The…

A: The objective is to find out the relative amounts of the following compound given thedensity of…

Q: NHẠNO3 MgSO4 [1] Mass of salt (g) 1.968 1.981 [2] Volume of DI water (mL) 50.0 50.0 Mass of DI water…

A: When we dissolve a salt in solvent( distilled water), heat is either released or absorbed. The…

Q: Using the table provided, what is the enthalpy for the reaction shown below: 6H₂(g) + 4NO(g) + CH4…

A: The thermochemical equations can be treated as algebraic equation which can be added,  subtracted,…

Q: Determine the mass of the product from the following data.    Mass Aluminum Foil (g)      2.5415…

A:

Q: A chemistry student weighs out 0.112 g of formic acid (HCHO2) into a 250. mL volumetric flask and…

A: The balanced chemical equation for the reaction between formic acid (HCHO2) and sodium hydroxide…

Q: Determine the mass of the product from the following data.    Mass Aluminum Foil (g)      6.3284…

A: Given data,Mass of filter paper+product=86.2751gMass of filter paper=0.2489g

Q: A chemist prepares a solution of silver(I) perchlorate (AgCIO,) by measuring out 4.4 x 10 umol of…

A: Number of mol of silver (I) perchlorate (AgClO4 ) = 4.4 × 102 u mol  ...Or  because 1u (micro) =…

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.