During a chemical reaction nb of atoms and mass is always conserved , so mass of Reactants is equal mass of Products.
Answer: See explanation
Explanation:
1. Separation of charges in an object without touching it is (charging by induction).
2. The work done moving a positive test charge between two points in an electric field divided by the magnitude of the test charge is the electric (potential difference).
3. An electric (conductor) is a material through which charges move about easily. (Charging by conduction) is giving a neutral object a charge by touching it with a charged object.
4. A material through which electrical charges does not move easily is an electrical (insulator).
5. The lines providing a picture of the size and strength of the field around a charged object are called the (electric field lines).
6. The property of the space around a charged object that exerts a force on other charged objects is the (electric field).
7. A device that helps determine charge using pieces of metal foil is an (electroscope).
8. The magnitude of the charge of an electron is the (elementary charge)
Br- < Se2- < As3- < Sr2+ < Rb+
I hope this helps although I'm not a hundred percent sure!
Answer:
CH3COOH will be the acid, because it is the stronger acid.
Explanation:
When an acid deprotonates in a solution, an equilibrium reaction will occur between the protonated form and the deprotonated form (conjugate base) of it. The equilibrium is characterized by the value of Ka, the equilibrium constant, which is the multiplication of the concentration of the products divided by the concentration of the acid.
As higher is the value of Ka, more acid is deprotonated, and stronger will be the acid. The value of pKa = -logKa, and so, as higher is the Ka, as low is the pKa. Thus, strong acids have low pKa values.
In the reaction of CH3COOH and H2O, the first one has a low value of pKa, so it is a strong acid. The water is a substance that can work as an acid or as a base, and, because of the other substance is a strong acid, it works as a base.
The balanced equation for the above reaction is;
2H₂(g) + O₂ --> 2H₂O
Stoichiometry of H₂ to O₂ is 2:1
This means that the molar ratio in which H₂ reacts with O₂ is in the 2:1 ratio.
At constant temperature and pressure , number of moles are directly proportional to volume of gas. Therefore volume ratio in which H₂ reacts with O₂ is 2:1.
volume of 2 mL of H₂ reacts with 1 mL of O₂
therefore 250 mL of H₂ reacts with - 1/2 x 250 = 125 mL
volume of 125 mL of O₂ is required for the reaction
