Answer:
20.91% of the hydrated calcium sulfate salt is water
Explanation:
<u>Step1</u> : Calculate the mass of H2O that evaporated
A hydrated salt has a mass of 1.803g. After heating at 170° C, this means water will evaporate, the mass of the salt is 1.426g
The difference is water that evaporated.
⇒Mass H2O of hydration =1.803 g - 1.426g g = 0.377 g H2O
<u>Step 2</u>: Calculate the % of water in the hydrated calcium sulfate salt
⇒ mass of H2O = 0.377g
⇒ mass of calcium sulfate salt = 1.803g
⇒ % water in the calcium sulfate salt = (0.377 / 1.803) x 100% = 20.91%
20.91% of the hydrated calcium sulfate salt is water
Answer:
Anthropocene
Explanation:
Anthropocene epoch is sort of unofficial epoch that scientists have used to describe basically human made impact on geological scale.
here's more info:
https://www.earthsystems.com/the-anthropocene/
A substance that has no specific volume changes to a substance that has a specific volume.
Answer:
1. First one is true : as per periodic table down the group , the elements has increasing order of shell & with that the London dispersion forces brings the inter-molecules close together and bromine converted into liquid .
2. second one is False because carbon-carbon bonds are not weak bonds they form mutual covalent bonds which are stronger bonds and cannot be easily disrupted .
3. A single carbon atom has the valency of 4 so it can be bonded with four hydrogen atom at the same time .
Explanation:
