Answer:
No. of moles = given mass of compound / Molar mass
Explanation:
Given mass = 10g
Molar mass = (40 + 12 + 3x16) =100g/mol
No of moles of CaCO3 = 10 / 100 =0.1 mol
According to Avogadro’s law –
1 mol of CaCO3 molecules contains 6.022 x 1023 CaCO3 molecules
Hence, 0.1 mol of CaCO3 molecules will contain 6.022 x 1023x 0.1 molecules
i.e. 0.6022 x 1023 or 6.022 x 1022 molecules
This is all I can give
Answer:
P = 0.75 atm
Explanation:
Using Boyle's law
Given ,
<u>For Bulb A</u>
Pressure = 190 torr
The conversion of P(torr) to P(atm) is shown below:
So,
Pressure = 190 / 760 atm = 0.25 atm
Volume = 200 mL
For Bulb B
Pressure = 1 atm
Volume = 400 mL
For Bulb C
Volume = 1.00 L = 1000 mL
Pressure = 75.994 kPa
The expression for the conversion of pressure in KiloPascal to pressure in atm is shown below:
P (kPa) = P (atm)
75.994 kPa = atm
Pressure = 0.75 atm
Also, Total volume, V = 200 + 400 + 1000 mL = 1600 mL
Using above equation as:
We get, Total pressure, P = 0.75 atm
The scale will read <u>112 grams.</u>
Why?
Since we already know the percent error of the scale (12%) and we also know the mass of the block that is placed on the scale, we can calculate what will be the read of the scale by using the following formula:
We can see that the scale will read 112 grams.
Let's verify that we are right by using the following formula to verify if the obtained value for the scale read will be 12%:
Hence, we can see that the scale will read <u>112 grams.</u>
Have a nice day!
All the answers in the equation above will be Zero (0)