Chemical Equations
When one or more substances are changed into new substances is called this.
What is a chemical reaction?
If there is one product in your equation, then you have this type of reaction.
What is a synthesis reaction?
How many atoms of Iron (Fe) are in the following compound of Welshite: Ca2SbMg4FeBe2Si4O20
What is 1?
When a reaction absorbs heat and makes the atmosphere around it feel cold.
What is endothermic?
Gas production, odor, emitting light, forms a precipitate
What are indicators of a chemical change?
In chemical reactions the --> symbol stands for this.
What is yields?
When an element trades places with another element in a compound
What is a single replacement reaction?
In the following formula, the 4 beside the element hydrogen: CH4
What is a subscript?
When you add a strong acid to a test tube that contains metal and the metal becomes hot to the touch.
What is exothermic?
When you dissolve a solid in a liquid but there is no chemical change, the solid particles are said to be this.
What are too small to see?
When heat is produced, light is emitted, or a precipitate is formed this is an indication of this
What is a chemical reaction/change?
This chemical reaction has the generic formula of:
AB --> A + B
What is a decomposition reaction?
The number 3 in the following chemical formula: 3NaOH
What is a coefficient?
An exothermic reaction releases heat the atmosphere around it.
What is gets warmer?
A closed system mass throughout a chemical change.
What is stays the same?
In the chemical reaction, Mg + O -> MgO, the compound MgO is located on this side of the equation.
What is the product side?
When the substance is not changed, except by size, shape, or phase
What is a physical change?
The number of atoms of each element in the formula C6H12O6
What is 6 carbon, 12 hydrogen, and 6 oxygen?
A cold pack works because it causes the atmosphere to get colder because it is endothermic.
What is absorbs heat?
A burning candle placed in a closed container goes out because it is missing a key component to keep the fire going.
What is runs out of oxygen?
When the number of atoms are equal on both sides of the equation, this law has been fulfilled.
What is the Law of Conservation of Mass?
When ions from 2 compounds switch places, this type of reaction occurs.
What is a double displacement reaction?
Matter cannot be created or destroyed.
What is the Law of Conservation of Mass?
The following equation H2 + O2 --> 2H2O + Heat
What is releases heat?
Methane has a density of 0.714 and room air has a density of 1.16, this causes the methane to do what
What is rise above the air or sit on top of it?