Match the vocabulary word with its definition
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
mass | arrow_right_alt | reaction and it's environment |
interpret statement | arrow_right_alt | quantity does not change |
conservation | arrow_right_alt | measures the number of atoms in a sample |
hydrate | arrow_right_alt | an observation of a feature |
product | arrow_right_alt | connects an observation to a process |
salt | arrow_right_alt | a substance before a chemical reaction |
anhydrate | arrow_right_alt | a substance created by a chemical reaction |
identify statement | arrow_right_alt | the number of atoms of each element in the product is equal to the number of atoms in the product |
system | arrow_right_alt | solid |
(l) | arrow_right_alt | gas |
reactant | arrow_right_alt | liquid |
(s) | arrow_right_alt | whether a substance is a solid, liquid or gas |
(g) | arrow_right_alt | a crystalline compound that contains water |
state | arrow_right_alt | a compound formed from metal and nonmetal atoms |
balanced chemical equation | arrow_right_alt | a hydrate from which the water has been removed |
How does mass and heat change in the different types of system
Changes | Does Not Change | |
|---|---|---|
Mass in an open system | ||
Mass in a closed system | ||
Heat in a open system | ||
Heat in a closed system |
Match the identify statements with the features of the graph
Match the interpret statements with the features of the graph
A sample of methane gas (CH₄) is burned in oxygen (O₂) according to the reaction:
CH₄ (g) +2O₂ (g) → CO₂ (g) + 2H₂O (l)
If 16 grams of methane is burned and the mass of carbon dioxide (CO₂) and water (H₂O) produced is 44 grams, how much oxygen was used in the reaction?
A certain amount of sodium chloride (NaCl) is decomposed into sodium (Na) and chlorine gas (Cl₂) using electricity using:
2NaCl (s)→2Na (s) +Cl₂ (g)
If the mass of sodium is 28 grams and the mass of the chlorine gas produced is 35 grams, what was the mass of sodium chloride at the start of the chemical reaction?
Hydrogen gas (H₂) reacts with oxygen gas (O₂) to form water (H₂O) according to the reaction: 2H₂+O₂→ 2H₂O
If 4 grams of hydrogen gas is reacted with 32 grams of oxygen gas, how much water is produced?
Nitrogen gas (N₂) reacts with hydrogen gas (H₂) to produce liquid ammonia (NH₃) according to the reaction:
N₂ (g) +3H₂ (g) →2NH₃ (l).
If 28 grams of nitrogen gas reacts with hydrogen gas, and the mass of ammonia produced is 34 grams, what is the mass of hydrogen gas used?
A sample of methane gas (CH₄) is burned in oxygen (O₂) according to the reaction:
CH₄ (g) +2O₂ (g) → CO₂ (g) + 2H₂O (l)
If 32 grams of methane and 128 grams of oxygen react and produce 88 grams of carbon dioxide (CO₂), how much water is produced?
A hydrate is heated until all the water is released, the starting mass of the hydrate was 100 grams. The final mass of the hydrate is 68 grams. What was the mass of the water in the hydrate in grams?