Answer: B
Explaination: The liquid solution changed color means is turned into a different substance with different properties. It is chemical change .
Answer:
nitrogen
Explanation:
Nitrogen, in cans of Guinness stout (to give it that distinctive head) and in fire suppression systems.
Answer:
Increases by 100 Pa
Explanation:
According to The Ideal Gas Equation,
- the temperature of the gas is directly proportional to the volume of the gas present in it
- If the temperature rises from 100 K to 200 K, then the volume will increase by 100 Pa (standard unit of Pressure)
Answer:
79.89%
Explanation:
Copper has a molar mass of 63.55
Oxygen has a molar mass of 16.00
If you add these you get 79.55
To get the mass percent of copper divide copper by the whole. 63.55/79.55*100= 79.89%
