The density of a substance can simply be calculated by
dividing the mass by the volume:
density = mass / volume
Therefore calculating for the density since mass and volume
are given:
density = 46.0 g / 34.6 mL
density = 1.33 g / mL
Answer:
Yes
Explanation:
It does because of the fact that plants need water to live and the grow. Water helps the plant grow, and certain plants would need less or more water based on their roots, leaves, and tempurature tolerancy.
A or c fr !! Ok so I pick a and got it right
Answer : The dissociation constant (Ka) = 9.025 × 
Solution : Given,
Concentration HF solution = 0.100 M
% Dissociation = 9.5 %
The equation for dissociation of HF is :
The Ka expression for HF is :
![Ka=\frac{[H^{+}][F^{-}]}{[HF]}](https://tex.z-dn.net/?f=Ka%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BF%5E%7B-%7D%5D%7D%7B%5BHF%5D%7D)
............. (1)
Step 1 : we find the ![[H^{+}]](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D)
by using the concentration and % dissociation.
= Concentration HF solution × % Dissociation
= 0.100 M × 
= 9.5 × 
M
Step 2 : For ![[F^{-}]](https://tex.z-dn.net/?f=%5BF%5E%7B-%7D%5D)
, the concentration of is equal to the . From the above equation the stoichiometry of and is 1:1.
Therefore,
= = 0.100 M × = = 9.5 × M
Now, put all the values in equation (1), we get
= 9.025 ×
Answer:
22km
Explanation:
Las velocidades de los móviles nos van a definir cuánta distancia recorren por unidad de tiempo. Para resolver este problema debemos hallar la distancia recorrida en una hora por cada vehículo (Porque de las 12 horas a las 13 solo hay una hora)
Un móvil está recorriendo 50km/h. En una hora recorrerá: 50km
El otro móvil recorre 20m/s. En km/h:
20m/s * (3600s / h) = 72000m/h * (1km / 1000m) = 72km/h. El móvil recorrerá, en una hora, 72km
<em>1h = 3600s; 1km = 1000m</em>
La distancia que los separa es de:
72km - 50km =
22km
