Answer:
- 3.1 cm
- 14.1%
Explanation:
L.error = student's measurement - actual length
L.error = 23.1-20.0
= 3.1
the percentage is 3.1/22*100=14.1%
Answer:
Clouds are water
Explanation:
When a gas gathers up into a cloud,the cloud starts to rain and water comes out of the cloud.
Answer:The name of the given molecule is 1-octene
1) We will number the carbon chain in such a way that so that smallest number should reside on the carbon atom with double bond. By numbering we the chain we can see that carbon with double are given with number '1'.
2) Now we will count the number of carbon atoms in a given chain. There are 8 carbon atoms present in the given molecule.
According to IUPAC naming of organic molecules :
1) First write the number on which double bond is present. Here is number '1' like this '1-'.
2) After this write the prefix which will tell us about the number of total carbon atoms present in the chain followed by suffix 'ene'(suffix used for hydrocarbon with one double bond). Here there are 8 carbon atoms and prefix for eight carbon atoms is 'octa'
So, the name of the given molecule is : 1-octene
Answer:
When the substance is cooled, its temperature will fall below 78 °C after 100% of the vapor has changed to liquid.
Explanation:
- Boiling point is the temperature at which a liquid changes state from liquid form to gaseous form without change in temperature. It may defined as the temperature at which the vapor pressure is equal to the pressure of the gas above the liquid.
- A liquid with a boiling point of 78°C, it means that, when the liquid is heated, its temperature will start rising above 78 °C after 100% of the liquid has changed to vapors. Additionally, when the liquid is cooled, its temperature will fall below 78 °C after 100% of the vapor has changed to liquid.