Beta particles will bend toward the South Pole of the magnet.
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Answer:
32.4%
Explanation:
Given parameters:
Mass of hydrated sample = 25g
Mass of anhydrous salt = 16.9g
Unknown:
Percentage of water in the hydrate = ?
Solution:
Obviously, there is a mass difference between the original hydrated sample and anhydrous salt which should indicate clearly that the mass loss is due to the evaporated water from the salt.
Mass of salt of water = mass of hydrated salt - mass of anhydrous salt
= 25g - 16.9g
= 8.1g
Percentage of water = ![\frac{mass of water}{mass of hydrate} x 100](https://tex.z-dn.net/?f=%5Cfrac%7Bmass%20of%20water%7D%7Bmass%20of%20hydrate%7D%20%20x%20100)
=
= 32.4%
Answer:
27.99 dm³
Explanation:
Applying
PV = nRT................ Equation 1
Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.
From the question, we were aksed to find V.
Therefore we make V the subject of the equation
V = nRT/P................ Equation 2
Given: n = 1.31 moles, T = 37°C = 310K, P = 904 mmHg = (904×0.001316) = 1.1897 atm
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
V = (1.31×310×0.082)/(1.1897)
V = 27.99 dm³