10 All the following are evidence of a chemical change except- F production of a gas G production of a precipitate H a new substance formed a decrease in size

Q: Nor 99 Nor 99 Nor Bra Bra Homepa Homep G Am ь Му W KM O 200 В Нус O AP 15. G The G AO Q AP + A…

A:

Q: 2 Fe + O2→2 FeO 1. The numbers in red boxes are... A. subscripts B. coefficients C. reactants D.…

A: The chemical on left side of arrow are consider as reactant on right side it is consider as product.…

Q: A baby's spoon with a surface area of 6.25 cm² is plated with silver from AgNO3 using a current 2 A…

A: Given : Surface are of spoon = 6.25 cm2  Current = 2 A And time = 2 hr 25 min = 145 mins…

Q: Which is an example of a chemical change? Steam from the boiling water condenses on the ceiling The…

A: CHEMICAL CHANGE  :- A chemical change as the name suggests, brings a change in the chernical…

Q: a

A: Dear student I have given answer to your question in the image format.

Q: Part B Observe and record the appearances of the metal strips and the solutions in the test tubes.…

A: Appearance of metal and metal solution

Q: Judge the following statements as true or false. If you believea statement to be false, provide a…

A: a) This statement is false. Air is a mixture of elements such as Oxygen, Nitrogen and other gases…

Q: The following is an example of a physical change: O formation of rust O production of energy by…

A: Physical change: In a physical change only the state of matter changes. In this change different…

Q: 2. Making a cheese sandwich can be represented by the chemical equation%; Bd, + 2Ch > 2BdCh What…

A: According to the reaction, Bd2 + 2Ch ----> 2BdCh   2 bread slices combine with 2 cheese slices to…

Q: Which is not a clue that could indicate a chemical change? O Change in color O Change in shape O…

A: Change in shape don't indicate the chemical change .

Q: Which of the following steps in an overall process involve( s) a physical change and which…

A: Physical change: These are the reversible changes that clarify the physical property of sample.…

Q: A student performs a reaction and the mass of the watch glass, filter paper, and product together…

A: Mass of watch glass + filter paper + product = 130.0g Mass of watch glass = 80.0g Mass of filter…

Q: lene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change…

A: Sugar dissolves in water is a physical change because in this change no new substance/compound is…

Q: 4. Steam activation is carried out using steam at temperatures of between - 800°C and 1000°C. At…

A: In this question, we have to write True or false regarding the given statement.

Q: Which of the following statements relating to energy is not true?  a. kinetic energy results from…

A:

Q: b,PO, wi (aq) (s) (g)

A: Given compound is Rb3PO4 . Chemical name of  Rb3PO4  is Trirubidium phosphate .

Q: What three types of information does a balanced chemicalequation provide? How?

A: Balanced chemical equation for a chemical reaction is the one that has same number of atoms on both…

Q: Which option provides the best evidence of a chemical change? O A. A solid is not visible after it…

A: The change which is brought about by the difference in the physical appearance of the species in…

Q: 3. Which of the following processes is best described as a chemical change? Upon heating, mercury…

A: A chemical change is defined as the change in the chemical formula of the compounds. So whenever…

Q: In an experiment, calcium carbonate reacted with different volumes of hydrochloric acid in water.…

A: Calcium carbonate reacts with hydrochloric acid to form the carbon dioxide gas.

Q: Carbon Dioxide + Ammonia OC(NH2)2 Water REACTANTS PRODUCTS Element Symbol How Many? Element Symbol…

A: The answer is given as follows

Q: Match the letter/s that correspond to the descriptions in the given numbers: A.chemical equation AB.…

A: In a chemical reaction, reactants give products and in a balanced chemical equation, the number of…

Q: use the web to determine the amount of aluminum used in the united state in a single year. What is…

A: A question based on use of Al, which is to be accomplished.

Q: 15) Sugar, C„H„O,, is burned in air. 16) Ammonia is formed from its elements.

A: As already mentioned that , I have to do only qestion-15 and question -16 so I am doing that…

Q: Which type of energy is stored in fuels?

A: A fuel is substance that can be made to react with other substances so that it releases energy in…

Q: Earthquake may occur due to: a. Transform tectonic boundaries. b. Active jointing area. c. a sudden…

A:

Q: Read the question carefully and encircle the letter of the correct answer. The following statement…

A: Chemical reactions produce new substance and particles are rearrange to form new substance . Matter…

Q: A cup of sea water from Galveston Bay ( containing 3.0 x 104 ppm NaCl. Density for sea water is 1.05…

A: Here we have to compare the saltyness of sea water and soy sauce solution from the following given…

Q: 8. Mars is known as the "Red Planet" because of the red color of its soil. The red soil is rich in…

A:

Q: A student places 1.520 grams of copper wire along with excess sulfur into a crucible (and cover),…

A:

Q: 21. In the below figure, what does 'a' representa? a Limestone, Siles, Alumina etc. Grinding (a)…

A: 21. C

Q: 16. What is 20.0 °C in K and "F? A: 293.2; 68.0

A: The temperature 20.00C is to be converted to other scales of temperature.

Q: X 12. Which of the following is not 0/1 something which happens during a chemical change: * Gas is…

A: In a chemical change, reactants are converted into the products.

Q: KCIO, + C,„H0,, → KCI +CO, + H,0 3 11

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Q: Classify each of the following as elements (E) or compounds (C). HCI NaCI CH,COOH Fe element

A:

Q: Judge the following statements as true or false. If you believea statement to be false, provide a…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: A match is lit and held under a cold piece of metal. The followingobservations are made: (a) The…

A: Physical changes are those in which change is physical appearance takes place like smell, heat etc.…

Q: substance. 3. А (An) 4. According to the law of be neither created nor destroyed during means…

A: (4) According to the law of __________, Matter can neither be created nor destroyed during a…

Q: Energy that is associated with the position or composition of an object is called O thermal energy.…

A: An object can posses many types of energy depending on its chemical behavior, motion, position,…

Q: Evidences of Chemical Change Certain indications can tell you when a chemical change has taken…

A: Different signs of chemical change are; Colour change Production of odour Change of temperature…

Q: What kind of change is ripping a piece of paper towel from the roll, and what kind of change is…

A: Ripping a piece of paper towel from the roll is a physical change as here the piece of paper is…

Q: Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when…

A:

Q: Does each of the following describes a physical or chemical change, explain why. d. the growth of…

A: d. the growth of plants depends on the suns energy in a process called photosynthesis e. a spoonful…

Q: What a substance that cannot be broken into simpler substance by a chemical change.

A:

Q: 6. Catalisis básica Br Catalisis ácida

A: Step -1 In presence of  Catalisis basica  alkylation will happen  Step-2 In presence of Catalisis…

Q: sodium is not kept in  a  petrol  b  k oil  c  n hexane d  water

A:

Q: All of the following are properties of zinc. Which is NOT a physical property. It corrodes with…

A: In this question, we will select the statement which is not a physical property that means it is a…

Q: Is cooling a nuclear reactor consider a chemical or a physical change?a) Physical b) Chemical c)…

A: If the reaction is irreversible and bond making and bond breaking occur in the reaction and then…

Q: What is -30°F in K? Зок O 30K O 303 K O-30 K O 239 K 04K

A: To convert F to K, Subtract 32 from the Fahrenheit temperature. Multiply this number by 5. Divide…

Q: Crushing an empty water bottle is a chemical change. Select one: O True O False

A: Crushing a bottle is a physical change. In this change Only shape of the bottle change and there is…