in a chemical reaction which of the following must remain unchanged temperture number of atoms phase...
Homework Answers
During a chemical reaction the total number of atoms remain same to obey the law of conservation of mass .
However the number of molecules in the reactant or product may not be same .
Phase change and temperature change may often during the chemical reaction .
Therefore, the correct answer is no. of atoms.
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in a chemical reaction which of the following must remain
unchanged
temperture
number of atoms
phase...
Which of the following is incorrect? A. A change in phase is not accompanied by a...
Which of the following is incorrect? A. A change in phase is not accompanied by a change in temperature. B. Kinetic energy of a chemical system involves the energy of motion of atoms, ions, and molecules in the system. C. A bomb calorimeter measures heat exchange at constant volume. D. A substance in a solid state which changes directly to a gas has undergone a sublimation reaction. E. All of the above statements are correct.
4. Chemical Reaction: Consider the following chemical equation: Where x , y , z ,u and...
4. Chemical Reaction: Consider the following chemical equation: Where x , y , z ,u and v are the numbers of molecules of NH3 , , H, , H,0 and . respectively, to be determined. [Here, a molecule with the symbol NH indicates that it contains 1 atom of the element N and 3 atoms of the element H. Similar interpretation applies to the other molecules in the equation.] Given that the total number of atoms for each of the...
Thank you everymuch I will rate quickly when answered! Chemical reactions occur when molecules or atoms...
Thank you everymuch I will rate quickly when answered!
Chemical reactions occur when molecules or atoms collide, the bonds between atoms are broken, and new bonds are formed. Breaking the bonds of the reactants requires energy; bond formation releases energy Which of the following statements regarding energy changes during a reaction are true? The energy of a collision between atoms or molecules must be greater than or equal to the activation energy (Ea) for bonds to be broken. When the...
Consider the following chemical equation: 2KCl + CaSO: - K SO. + CaCl, Which of the...
Consider the following chemical equation: 2KCl + CaSO: - K SO. + CaCl, Which of the following statements is FALSE? The same number of molecules are in the reactant side of the equation as product The same number of atoms are in the reactant side of the equation as product side Reactant molecules are on the left side of the arrow Product molecules are on the right side of the arrow, The arrow represents the chemical reaction taking place An...
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must...
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rxn < 0 b) AS rxn > 0 c) AGºrx < 0 d) Both a and c e) Both b and c
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must...
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rxn <0 b) AS nu>0 c) AGO < 0 d) Both a and c e) Both b and c
For the reaction of iodine atoms with hydrogen molecules in teh gas phase, these rate constants...
For the reaction of iodine atoms with hydrogen molecules in teh
gas phase, these rate constants were obatined experimentally: 2
I(g) H2(g) ?> 2 HI (g) Calculate the activation energy for this
process:
Which of the following correctly applies to a catalyst? A. They do not actually participate in...
Which of the following correctly applies to a catalyst? A. They do not actually participate in the chemical reaction and therefore is unchanged at the end of the reaction. B. They provide an alternate lower energy mechanism by which the reaction proceeds. C. They must be in the same phase as the reactants in the chemical reaction. D. Biological catalysts are proteins called substrates. A) A, D B) A, B C) B, C D) B
please answer Which of the following quantities does not contain the same number of atoms as...
please answer
Which of the following quantities does not contain the same number of atoms as there are in 80.2 grams of Ca? O 6.02 x 1023 molecules of O2 O 64.2 grams of S O 6.02x 1023 atoms of Ni O 0.50 moles of Pa molecules
3) For a chemical reaction to be spontaneous for standard conditions, which of the following must...
3) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rx > 0 b) AS rx c) AGºrx < 0 d) Both a and c e) Both b and c
4. Chemical Reaction: Consider the following chemical equation: Where x , y , z ,u and v are the numbers of molecules of NH3 , , H, , H,0 and . respectively, to be determined. [Here, a molecule with the symbol NH indicates that it contains 1 atom of the element N and 3 atoms of the element H. Similar interpretation applies to the other molecules in the equation.] Given that the total number of atoms for each of the...
Thank you everymuch I will rate quickly when answered!
Chemical reactions occur when molecules or atoms collide, the bonds between atoms are broken, and new bonds are formed. Breaking the bonds of the reactants requires energy; bond formation releases energy Which of the following statements regarding energy changes during a reaction are true? The energy of a collision between atoms or molecules must be greater than or equal to the activation energy (Ea) for bonds to be broken. When the...
Consider the following chemical equation: 2KCl + CaSO: - K SO. + CaCl, Which of the following statements is FALSE? The same number of molecules are in the reactant side of the equation as product The same number of atoms are in the reactant side of the equation as product side Reactant molecules are on the left side of the arrow Product molecules are on the right side of the arrow, The arrow represents the chemical reaction taking place An...
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rxn < 0 b) AS rxn > 0 c) AGºrx < 0 d) Both a and c e) Both b and c
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rxn <0 b) AS nu>0 c) AGO < 0 d) Both a and c e) Both b and c
For the reaction of iodine atoms with hydrogen molecules in teh
gas phase, these rate constants were obatined experimentally: 2
I(g) H2(g) ?> 2 HI (g) Calculate the activation energy for this
process:
please answer
Which of the following quantities does not contain the same number of atoms as there are in 80.2 grams of Ca? O 6.02 x 1023 molecules of O2 O 64.2 grams of S O 6.02x 1023 atoms of Ni O 0.50 moles of Pa molecules
3) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rx > 0 b) AS rx c) AGºrx < 0 d) Both a and c e) Both b and c
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