Answer:
Molarity of a 5.0 L solution that contains 0.5 moles of KNO3 is 0.1 M
Explanation:
Molarity : It is used to express the concentration of the solution and defined as total moles of solute present in one liter of solution .
Moles of KNO3 = 0.5 (given)
Volume of solution = 5.0 L
Substitute the value in given formula ,
on calculation,
Molarity = 0.1 mol/L
Molarity = 0.1 M
(M = mol/L)
As we move down the group, the metallic bond becomes more stable and the formation of forming covalent bond decreases down the group due to the large size of elements.
Covalent and metallic bonding leads to higher melting points. Due to a decrease in attractive forces from carbon to lead there is a drop in melting point.
Carbon forms large covalent molecules than silicon and hence has a higher melting point than silicon.
Similarly, Ge also forms a large number of covalent bonds and has a smaller size as compared to that of Sn. Hence melting point decreases from Ge to Sn.
The order will be C>Si>Ge>Pb>Sn.
To learn more about the covalent bond, visit: brainly.com/question/10777799
#SPJ4
Answer: A strong acid like HCl dissociates completely in an aqueous solution.
By definition a strong acid is that that dissociates completely in aqueous solutions. That means that all the molecules of the acid will be inoized into hydronium cation (H3O+) and anion (the negative radical).
For expample, HCl is a strong acid because
HCl + H2O----> H3O(+) + Cl-
The forwar arrow indicates that all the molecules of HCl reacted with the water for form the ions.
Answer:
1) chemical property
2) physical property
3) chemical property
4) physical property
Explanation:
Physical properties:
Physical properties are those properties which can be measured without changing the composition of mater. We can observe the object and tell its physical properties like its texture, physical appearance, color, melting point, boiling point, odor, density etc.
Chemical properties:
Chemical properties involve chemical reaction or we can say that change is happen in mater during chemical reaction and the properties, we measured during this or as a result of this reaction is called chemical properties. Like flammability, toxicity, combustion, decomposition etc.
1) Water can split into hydrogen and oxygen
chemical property
2) water is liquid at room temperature
physical property
3) water react with certain metals
chemical property
4)The density of water is 1.0 g/cm³
physical property
Explanation:
Air bags help lessen injuries in an automobile crash is application of Boyle's law:
Boyle's law states that at constant temperature, the volume of given mass of a gas is directly proportional to the pressure changes.
According to this law, the volume of the air bag will increase. The bag will become bigger as a result of decrease in the gas pressure in the bag.
The bag was packed with gases under high pressure and their volume decreases appreciably. After a collision, pressure reduces and the gas expands.
helium balloon decreases in size when you put it into a freezer
A can of spray paint will explode if tossed into a fire
Both are application of Charles's law:
According to this law "the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant".
The helium balloon decreases in size because the temperature is lowered. The particles will keep tending towards a state of rest.
A can spray paint explodes because the gas in it will keep expanding as the temperature increases in a fire.
learn more:
Charles's law brainly.com/question/7316997
#learnwithBrainly
