What does the yield sign mean in a chemical equation?
used to separate the reactants from the products – it is pronounced “yields” or “produces” when the equation is read. used when the reaction can proceed in both directions – this is called an equilibrium arrow and will be used later in the course. (g) indicates that the substance is in a gaseous state.
What does it mean when a triangle is placed above the yield sign?
Triangle above arrow. Heat above arrow. Indicates that heat is applied to the reaction. Element or compound above arrow. A formula written above or below the yield sign indicates its used as a catalyst (to speed up the reaction)
What does it mean when a chemical formula is above an arrow?
A symbol written above or below the reaction arrow indicates special reaction conditions. For example, when mercuric oxide is heated it decomposes into mercury metal and oxygen gas; this reaction is shown by the equation 2HgO →Δ 2Hg + O2↑.
What is the meaning of a yield sign?
A yield sign isn’t the same as a stop sign, but they are similar! When you encounter a yield sign, it means that you’ll need to allow oncoming traffic or pedestrians to go first before you continue driving. If no other people or vehicles are coming from the other direction, you don’t need to come to a complete stop.
What does an arrow pointing down means in chemistry?
precipitate
An arrow pointing down (as in PbI2?) indicates that the product will spontaneously precipitate from the solution. (“Precipitate,” in this sense, means the formation of a solid from the combination of two aqueous solutions.)
What is written above and below reaction arrow?
The conditions (solvent, temperature, etc.) are commonly listed above or below the reaction arrow. Sometimes reagents are on the left side of the reaction arrow, while other times reagents are listed above or below the reaction arrow.
Does the arrow in a chemical equation mean yield?
The reactants (the chemicals that initiate the chemical reaction) are represented on the left, while the products (the substances that result from the reaction) are represented on the right. An arrow sign (“→” commonly read aloud as “yields”) separates the two.
What does a yield sign mean quizlet?
Yield Sign. COLOR: Red and white, with red letters. MEANING: Decrease speed as you reach the intersection. Prepare to stop and yield the right-of-way to vehicles and pedestrians in or heading toward the intersection. You must come to a full stop at a YIELD sign if traffic conditions require it.
What do you do at yield sign?
The yield sign is a regulatory sign. At a yield sign, drivers must slow down and yield the right-of-way to pedestrians and vehicles that are approaching from another direction.