Water has this unusual
behavior when cooled at <span>4 degrees Celsius; it expands slightly until
it reaches the freezing point and continue to expand by approximately 9%. This characteristic has something to do with the structure of the water molecule where there is a
strong tendency to form a network of hydrogen bonds and each hydrogen atom is
in a line between two oxygen atoms. These bonds force the crystalline
structure to be very open into hexagonal form and expand dramatically.
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I'm going to assume you are speaking about the characteristics of weather.
Here they are:
Humidity
Air Temperature and Pressure
Wind Speed/Direction
Cloud Cover and what kind of clouds.
Also the amount of precipitation as well as what effects the different kind of weather phenomenon to change into e.g. Freezing rain, Hail, Straight Line winds, etc.
Answer:
41.4%
Explanation:
The salt copper II fluoride tetrahydrate is a hydrated salt. A hydrated salt is a salt that has some molecules of water of crystalization attached to its structure. The formula of the salt is CuF2.4H2O
The first step is to calculate the molecular mass of the compound as follows
[64 + 2(19) + 4((2×1) + 16)] = [64 + 38 + 72]= 174gmol-1
Mass of water of crystallization= 4((2×1) + 16) = 72 g
Percentage by mass of water of crystallization= 72 / 174 ×100
Percentage by mass of water if crystalization = 41.4%
Answer:
Explanation:
To calculate the theoretical yield, determine the number of moles of each reactant, in this case the sole reactant ethanol. Convert the 100 g to moles; the molecular weight of ethanol is 46 g/mole, therefore: Since there is only one reactant, it is also the limiting reagent.
Answer:
During a chemical reaction, substance called reactants are combined to form a new substance called products.
this sentence describes reaction and products of a chemical reaction
