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What else can I help you with?
What two quantities are necessary for a vector quantity?
a vector quantity has both direction (sign) and magnitude like displacement towards right or left (direction) and has a certain value (magnitude)
Is inches one apostrophe or two?
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.
Is thermal decomposition a endothermic or exothermic reaction?
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.
Why do batteries have a plus and - sign?
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!
Where can you get free yahoomail?
Go to www.yahoomail.com and look under the sign in. There you will see Sign Up. There is your answer.
What symbols indicate that a chemical reaction has occurred?
The sign equql + or an arrow to right.
When calcium carbonate and hydrochloric acid react bubbles form. How do you know a reaction occurred?
You can tell that a reaction occurred because you observed the formation of bubbles, which indicates the release of a gas (carbon dioxide) as a product of the reaction between calcium carbonate and hydrochloric acid. The appearance of bubbles is a clear sign of a chemical change taking place.
If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction you?
If you need to reverse a reaction and multiply it by 2 in Hess's law, the enthalpy change of the reaction will also change sign and double in magnitude. This is because reversing a reaction changes the sign of the enthalpy change. Multiplying the reaction by a factor also multiplies the enthalpy change by that factor. Therefore, the final value for the enthalpy of the reaction will be twice the original magnitude but with the opposite sign.
Is boiling always a sign of a chemical reaction?
No, boiling is not always a sign of a chemical reaction.
What is a precipitate and how does it help recognize that a chemical reaction has occurred?
A precipitate is a solid formed in a solution during a chemical reaction. A precipitate forms when two soluble substances react to produce an insoluble product. The presence of a precipitate indicates that a chemical reaction has occurred, as it is a visible sign of a change in the chemical composition of the solution.
Why is it a sign of a chemical reaction if gas is given off?
It is sign of chemical reaction because smell and heat is produced.
What is a sign on a chemical reaction that involves a new color being created during the reaction?
This sign doesn't exist.
What does the () sign signify in the reaction?
The () sign in a chemical reaction signifies that a substance is being added or combined with another substance.
What is the sign of the enthalpy change for an endothermic reaction?
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..
What is the sign for Energy change of an endothermic reaction?
The products of the reaction will have less energy than the reactants
What equation is used to indicate the exothermic reaction?
An exothermic reaction is typically indicated by a negative sign in front of the enthalpy change (∆H) in the reaction equation. This negative sign signifies that heat is released to the surroundings during the reaction.
Is it possible to have negative value in speed and displacement?
No, in physics, speed and displacement are scalar quantities that represent magnitudes and cannot be negative. However, the direction of motion can be indicated by assigning a negative or positive sign to the speed or displacement value.
