- ΔΗΕ

Q: What is the difference between a homogeneous and a het-erogeneous mixture?

A: Mixture is the physical combination of two or more than two different substances.

Q: Calculate the amount of calories required to raise the temperature of 21.8 g of water from 8.5°C to…

A: Given,The mass of water =21.8 g.Initial temoerature of water = 8.5 oCFinal temperature of water =…

Q: For the following reaction, calculate the value of Q. 2A 1B +3C [A] = 0.53 [B] = 0.24 [C] = 0.20

A: Given,

Q: НО ин г a он ? 2 N HIV- 2 D

A: The question is based on the concept of organic synthesis.  we need to synthesize the product using…

Q: For the following reaction, Na* (aq) + OH (aq) + H* (aq) + Cl- (aq) Na* (aq) + Cl- (aq) + H20 ()…

A: In given reaction , sodium ion Na+(aq) and chloride ion cl-(aq) remain same in both left hand side…

Q: How much solution could be heated to boiling by the heat evolved by the dissolution of 22.5 g of…

A:

Q: solid disappears.

A: According to the given data the solid is soluble in liquid and we have to separate the two.There are…

Q: magnesium + oxygen → magnesium oxide List two physical / chemical properties for each compound

A: Physical properties are properties of substance that can be determined without changing substance's…

Q: NaOH, H₂O, heat в Ә Na Ө Na О НО OH

A: An arrow always depicts from a region of high electron density to low electron density ; that is…

Q: H2O ? (b) -ОН ?

A:

Q: After sitting on a shelf for a while, a can of soda at a room temperature (69°F) s placed inside a…

A: Given: Ta = the temperature surrounding the object = temp. of refrigerator = 37oF To = initial…

Q: A pound of plain M&M® candies contains 96 g fat, 320 g carbohydrate, and 21 g protein. Carbohydrate…

A: Fuel value of candies.

Q: Draw the Lewis dot diagram for the compound CH4

A:

Q: define mixture and distinguish between mixtures andcompounds;

A: A mixture is a combination of two or more substances that can be mixed together in any proportion.…

Q: Ecell  Mg‎2+(aq) + 2 e- -> Mg(s)    Mg2 + |M‎g = - 2.372  Sn4‎+(aq) + 2 e- -> S‎n2+(aq)  Sn2 + , Sn4…

A: The addition of electrons or decreases in the oxidation state is known as a reduction reaction and…

Q: The specific heat of a certain type of cooking oil is 1.75 cal/(g ·°C). How much heat energy is…

A: To raise the temperature by 1∘ Celsius of a particular substance then for this a certain amount of…

Q: Solutions of sulfuric acid and lead(II) acetate react to form solid lead(II) sulfate and a solution…

A:

Q: balanced chemical equation in

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

Q: м NaOH H2O

A:

Q: Since the pandemic has hit, more people are growing their own gardens and processing the fruits of…

A: Each quart jar requires = 6.05g alum So, 50 quart jars would require = 6.05*50 g = 302.5g alum %…

Q: ① ② > CI CI Ran 30 ㅗ애

A: This reaction is conversion of alkyl halide to alcohol.  Here, the product formed is primary…

Q: What is the reaction of the following reaction? 1. Hg(OAc)₂, H₂O 2. NaBH, NaOH x

A:

Q: Air consists of mainly N₂ and O2, plus CO2 and other impurities. Air is classified as a pure element…

A: A homogeneous mixture is a mixture where all the components are in same phase, and are mixed evenly,…

Q: Cite the evidence that indicates that only physical changes occur when a platinum wire is heated in…

A: Physical change means any kind of change of a substance's form like size, colour etc. without being…

Q: A coal-burning power plant generates electrical power at a rate of 950 megawatts (MW), or 9.50 x 108…

A: The power is defined as the amount of energy transferred per unit time.

Q: Write a balanced equation for the combustion of gaseous methane (CH,), a majority component of…

A: A chemical equation is the simplest and easiest way to write the chemical formula of each of the…

Q: An allergen preparation requires adding 0.1 cL of an allergen solution to 2.5 mL of normal saline.…

A: Volume of allergen solution (V1) = 0.1 cLVolume of normal saline solution (V2) = 2.5 ml

Q: NO₂ (aq) + Al (s) →NH3 (g) + A1O₂ (aq) O NO₂ (aq) + H₂O(1) + 2A1 (s) + OH¯ (aq)→NH3 (g) +2A1O2¯ (aq)…

A:

Q: 100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.997 g/mL) to…

A: Given => Volume of Water = 100.0 ml  Density of Water = 0.997 g ml-1 at 25°C  Determine mass of…

Q: Write the balanced chemical reaction, including phase labels, for this reaction: "solid potassium…

A:

Q: N2H4(1) --> NH3(g)+N2(g) Express your answers as inetegers seperated by commas

A:

Q: -ntify the following as exothermic or endothermic. q = -1200 J AH = 527 kJ Two chemicals mis…

A: 1)     q = -1200 J   HEAT GIVEN BY THE SYSTEM IS TAKEN AS NEGATIVE,CLEARLY HEAT IS GETTING OUT OF…

Q: Knowing that 1 calorie = 4.184 joules and 1kWh = 3.6 x 106 Joules, convert the following: 2739…

A: Given: 1 calorie = 4.184 joules 1kWh = 3.6 x 106 Joules Toconvert: 2739 teraWh into nanocalories.

Q: Determine the enthalpy for this reaction: Express your answer in kilojoules per mole to one decimal…

A:

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.