Answer:
When a copper is drawn into wire the only change that occurs is change in its shape and size no change will take place into its composition that is the wires are still possessing the properties of copper metal. Thus, a physical change takes place when copper is drawn into wire.
Average kinetic molecular energy is actually defined by temperature, so any gas, no matter the volume or pressure, will have the same average kinetic molecular energy as long as its temperature is the same. Therefore, Gases A, B, and D all have the same average molecular kinetic energy, since they are at 12<span>°C.</span>
Answer: Option (d) is the correct answer.
Explanation:
When we dissolve an ionic compound in water then it readily dissociates into ions.
This is because ionic compounds are polar in nature and like dissolves like. Since, water is also polar in nature hence,
For example, NaF is an ionic compound as it is formed by transfer of an electron from sodium atom to fluorine atom.
So, when NaF is dissolved in water then it dissociates into and ions.
As electric current occurs due to movement of electrons or ions. Therefore, a solution with and ions is able to conduct electricity.
Thus, we can conclude that if you want to conduct an electrical current, then dissolving solid NaF in water would produce a solution capable of this.
Answer:
a message sent by telegraph and then delivered in written or printed form, used in the UK only for international messages since 1981
Answer:
To be enantiomers, a molecule must have at least three different atoms or groups connected to a central carbon.
Explanation:
To be structural isomers, the molecules must have the same formula and different structure, it means, the same number of each element. CH3CH2COOH and C3H6O2 have 3C, 6H, and 2O, so they can be structural isomers.
Cis-trans isomers occur in molecules with a double bond between carbons, and each carbon has to have 2 different atoms or groups connected to it.
Enantiomers are optic isomers, and to occur, the molecule has to have a chiral carbon (an asymmetric carbon), which is a central carbon connected to four different atoms or groups. So the third affirmative is false because it says that is necessary only three different atoms or groups connected to a central carbon.