We know, Given mass = Molar mass * Number of moles.
A.) <span>1.25 mol CaF</span>₂
Number of moles = 1.25
Molar mass = 78
So, Mass = 78 * 1.25 = 97.5 g
B.) 3.4 mol (NH₄)₂SO₄
Number of moles = 3.4
Molar mass = 132
Mass = 3.4 * 132 = 448.8 g
Hope this helps!
Answer:
Option B
Explanation:
The name of the molecule is;
1,1,1,3,3,3-Hexachloropropanone
Now, we can see that it contains propanone which is also called acetone. So it will have a double bond with Carbon(C) and Oxygen (O).
Option B has that double bond between C and O that indicates it propanone or acetone.
Thus, it is the correct option.
Answer:
309.1K
Explanation:
Step 1: Convert the flown heat to Joule
We will use the relationship 1 kJ = 1,000 J.
Step 2: Convert the mass of water to gram
We will use the relationship 1 kg = 1,000 g.
Step 3: Convert the initial temperature to Kelvin
We will use the following expression.
K = °C + 273.15 = 33.9°C + 273.15 = 307.1 K
Step 4: Calculate the final temperature
We will use the following expression.
where,
- c: specific heat capacity
Redshift is said to be experienced when the light or any other electromagnetic radiations from an object undergo an increase in the wavelength but it does not mean that the light literally becomes red.
Redshift occurs due to the expansion of space. It means the farther away the galaxy is from us, the more space it has expanded in the time.
Because as the light left the galaxy, more of the light has been stretched and so more redshifted the light is.
