Answer:
d = 0.743 g/cm³
Explanation:
Given data:
Mass of cylinder = 65.34 g
Height = 15.60 cm
Radius = 1.34 cm
Density of cylinder = ?
Solution:
Volume of cylinder:
V = πr²h (π = 22/7)
V = 88 cm³
Density of cylinder:
d = m/v
d = 65.34 g / 88 cm³
d = 0.743 g/cm³
I will assume the chemical reaction equation is like this:
<span>Ba(NO3)2 + Na2SO4 ---> 2 NaNO3 + BaSO4
</span>
For every 1 barium nitrate molecule used, there will be 1 barium sulfate formed. The number of molecule barium sulfate formed would be: <span>20.00 ml * 0.500 mol/1000ml * 1= 0.01 mol
The mass of barium sulfate produced: 0.01mol * </span>233.38 g/mol= 2.3338 grams
<u>Answer:</u> The standard EMF of the cell is 1.11 V
<u>Explanation:</u>
For the given chemical equation:

The half reaction follows:
<u>Oxidation half reaction:</u>
( × 3)
<u>Reduction half reaction:</u> 
To calculate the
of the reaction, we use the equation:

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.
Calculating the
using above equation, we get:

Hence, the standard EMF of the cell is 1.11 V
The minerals in hard water react with soap and affect its cleaning capacity. It's still possible to use hard water when washing by using more soap. The additional soap will no longer be affected by the minerals in the water, so they can clean just as effectively, but you'll be wasting more soap this way.
I'm not sure if this is your question but with NaCl (salt) and water it is homogeneous because when mixed, all the salt particles are even throughout and diffuse throughout the water.