1) Formation of a precipitate
2) Usually there is a colour change.
3)Neutralization reactions (also a double displ. reaction) involving an acid and a base form water which is a clue.
A lightning bolt is NOT a sign.
a vector quantity has both direction (sign) and magnitude like displacement towards right or left (direction) and has a certain value (magnitude)
The inch sign is two prime symbols (″), while the foot sign is one (′). In ordinary typing, single and double quotation marks or apostrophes may be substituted.
Thedecompositionof water is endothermic since energy is required to break up the bonds between the hydrogen and oxygen in the water molecule. Therefore the decomposition of water absorbs energy, making the reaction an endothermic one.
Because one side is the positive side (+) and one side is the negative side (-) They need to be there so people can place them in correctly. On objects there is also a plus and minus sign to match with the ones on the battery. You place the end with the plus sign in to match the end with the plus sign on the object and the end with the minus sign to match the minus sign on the object. Hope this helps!
Go to www.yahoomail.com and look under the sign in. There you will see Sign Up. There is your answer.
The sign equql + or an arrow to right.
No, boiling is not always a sign of a chemical reaction.
It is sign of chemical reaction because smell and heat is produced.
This sign doesn't exist.
Endothermic reaction: In an endothermic reaction, the products are higher in energy than the reactants. Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings by the reaction therefore enthalpy change show positive sign in a endothermic reaction..
Displacement is the change in position. Displacement= where you are now - where you use to be. Ex. you are walking on a path and see a sign that says, "170 m mark". Then you retrace your steps until you end up at a sign that says, "50 m mark". Finally you go forwrd on the path and stop at a sign that says, " 90 m mark". what is your displacement from the 170 m mark? Answer: 90 (where you are) - 170 (where you use to be) = -80 Your displacement is -80 m. Lauren "Physics above all!"
It means that the force is in a direction opposite to the displacement of the spring.It means that the force is in a direction opposite to the displacement of the spring.It means that the force is in a direction opposite to the displacement of the spring.It means that the force is in a direction opposite to the displacement of the spring.
the release of gas is a sign of Chemical reaction.
Activation energy is really just the minimum amount of energy needed for a chemical reaction to occur. Without it, the energy will stay the same and the substance cannot undergo a chemical change. The thing to look at, I think, is the product of the reaction. For example, in a graph, two substances could have the same activation energy, but after the reaction the amount of energy in substance 1 could be extremely low and the amount of energy in substance 2 could be higher than the activation energy. In substance 1, evidence of an EXOTHERMIC reaction has occurred because the amount of energy in the original substance was lost indicating that it has released energy. Whereas in substance 2, when the amount of energy was higher than the activation energy, it is evident that an ENDOTHERMIC reaction has occurred because the amount of energy after the reaction is higher than it was before the reaction. This shows that substance 2 absorbedenergy making it endothermic. hope this helps!
The Sun, Moon and Ascendant (rising sign) are considered the most important aspects of a natal chart. When a native has two of these placed in the same sign, they are said to be a double of that given sign. "Double signs" emphasize the traits of their given sign.
This is a sign of a chemical reaction.
gain or loss of heat to the environment