Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
A. Molarity . Explaining about Moles
Answer:
imbibición
Explanation:
La propiedad responsable del fenómeno observado es la imbibición de la puerta de madera maciza.
La imbibición se refiere a una situación en la que las partículas sólidas de una sustancia absorben agua sin formar una solución.
A medida que la puerta de madera absorbe agua, se hincha. Esto es responsable del levantamiento de la puerta. Esta absorción de agua ocurre cuando la temperatura y la humedad relativa son altas. Esto es así porque el aire más cálido retiene más humedad.
E. 0.42 meters / second
Since you are finding the average speed, you don't need to factor in all the stops Mary makes on her way to her final destination. Add the total distance she walked ( 80 + 125 + 45 ) and divide it by the amount of time IN SECONDS that it took for her to do this. Since the time given is in minutes, simply multiply the number of minutes ( 10 ) by 60 ( the amount of seconds in a minute ). Then divide the total number of meters walked by the total amount of seconds it took to walk, and you will get your average speed.
( Also, this is a Physics question, not Chemistry :D )
Answer:
8.22E⁰ kg
Explanation:
Given data:
Mass of glucose = ?
Number of molecules = 2.75×10²⁵ molecules
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For 2.75×10²⁵ molecules of glucose:
One mole of glucose = 180 g
180 g/6.022 × 10²³ molecules× 2.75×10²⁵ molecules
82.2 × 10² g
8220 g
8.22 Kg
8.22E⁰ kg