A student noticed a yellow, solid substance was formed when mixing two clear liquids during a lab. What term describes the yellow, solid substance? O physical change O exothermic reaction O endothermic reaction O precipitate

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Q: Classify the following processes as exothermic or endother-mic: (a) freezing of water; (b) boiling…

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Q: A spilled substance in the laboratory may be left unattended/ uncleaned even after a few days. The…

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Q: A 57.3 g sample metal with a specific heat of 0.421 J/g °C is heated using 1393 J of energy. By what…

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Q: A 152.0 g ball traveling at a speed of 2.30 m/s has a kinetic energy of Answr J

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Q: 1) Na 1, Acetone 2) Na* Ng, THF 0 °C 85% H3PO4. OH H20, heat

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Q: How much heat is required to raise the temperature of 34.0 g of water from-15 °C to 145 °C? heat:…

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Q: 115. This molecular drawing shows images of acetone mol- ecules before and after a change. Was the…

A: Physical properties are the properties of a compound which can be measured and determine the state…

Q: How is kinetic and potential energy differ?  How are they related?  Please cite an everyday…

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Q: Which statement is true? Since solids are rigid, their molecules do not possess kinetic energy…

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Q: How many calories 5000 Joules are?. No computation, no points

A: There are different units of heat-  1- joule 2- calorie

Q: 2. When 39.0 grams of silver are cooled from 80.0°C to 63.0°C, 159 joules of heat are released.…

A: Specific heat:The amount of heat required to increases the temperature of the 1 g of the substance…

Q: Question 43

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Q: A 63.3 g sample metal with a specific heat of 0.368 J/g°C is heated using 1873 J of energy. By what…

A:

Q: ng kinetic energy

A:

Q: A chemical reaction takes place to allow instant cold packs to absorb energy. This is an example of…

A: Reactions that absorb heat from the environment are called endothermic reactions. A common example…

Q: 31) H,O, H", heat OH

A: Benzene diazonium salts gives phenol in presence of H2O.H+ Again phenol undergoes coupling reaction…

Q: If the specific heat of water is ca increase the temperature of 75 g of water by 30 °C? 1gx1°C» how…

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Q: A student mixed sugar and water during a lab unt the sugar dissolved. This Is an example of a(N) O…

A: The formation of a solution can be either exothermic or endothermic process. If energy is released…

Q: A. Specific Heat Metal Mass of metal: 58.9530 Original temperature of water: Original temperature of…

A: Temperature loss of metal = [ 100-25] =75 0C Specific heat of metal = 0.285 J/g 0C

Q: what is the specific heat of something that goes from 23.6 degree celcius to 33.7 degree celcius…

A: Using conservation of energy equation   Q=mC∆twhereQ=heat energy m=mass of substanceC=specific heat…

Q: A scientist dropped a glass beaker on the lab floor and shattered it. Which property change does…

A: We know that, when shape of the substance is change then this type of property is known as physical…

Q: 4. An athlete eats food in order to get energy for their competition that day. What type of energy…

A:

Q: List some examples of kinetic energy.

A: Kinetic energy could be defined as the energy that is found in objects that are moving. The energy…

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: A____________________ AH corresponds to an O positive, exothermic O zero, endothermic O zero,…

A: Exothermic reaction are reaction in which heat is released in the surroundings. In endothermic…

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Q: How many joules are there in a 255 calorie snack ba O 1.07 x 103 O 1.07 x 106

A:

Q: When a new substance is formed with different properties than the original substance it is called a…

A: Answer:- This question is answered by using the simple concept of chemical change in which new…

Q: A chemical reaction takes place to allow hand warmers to give off heat. This is an example of a(n)…

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Q: Which state has more Kinetic energy?a) Liquid Water b) Solid water c) Water vapor

A: The kinetic energy is energy possessed by an object due to its virtue of motion.

Q: 11. Eric watches the snow melt outside. He claims it is an exothermic process. Maggie tells her it's…

A: Please find your solution below : 11. When a process absorbs the heat, it is called endothermic…

Q: H*, heat OH C. H, H.C

A:

Q: An example of using chemical energy is O a walking O b looking at the sun O c running d. eating

A:

Q: Mass of iron 64.8973 g Mass of water 61.9272 g Initial temperature of iron (boiling water Tm) 98.0…

A: Given:  Specific heat of iron = 0.450 J/g K Specific heat of water = 4.184 J/g K Specific heat is…

Q: Classify the chemical changes as endothermic or exothermic.

A: The given set of chemical changes have been classified as endothermic and exothermic reactions based…

Q: A 0.25g sample of a pretzel is burned. The heat it gives off is used to heat 50. g of water from 18…

A: Given information: Mass of sample = 0.25 g Mass of water = 50.0 g Initial temperature = 18°C Final…

Q: Identify the following processes as endothermic or exothermic.

A: Since we know that  Endothermic Process : The process in which heat energy is absorbed by the system…

Q: Kinetic energy is best characterized by O heat transferred from a hot object to a cool one energy…

A: Kinetic energy that is defined as the energy that is associated with particles that are not…

Q: Change 2 Change 3 Change 1 Change 3 is: Change 1 is: OImpossible a physical change Change 2 is: O…

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Q: Consider the gasoline in your car's gas tank. What happens to the energy stored in the gasoline when…

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Q: Time (minutes) Tomperature (OC)

A: Answer

Q: Freezing is a exothermic chemical change endothermic chemical change exothermic physical change…

A: Exothermic Reaction  In such reaction heat is produced during the reaction.  Endothermic reaction In…

Q: (Q2) Which of the following is an endothermic process? Water freezing Riding a bike up a hill Any…

A: