Answer:
Sodium metaborate: sodium+boron+oxygen= NaBO 2.
The formula can be written also as Na 2O·B
Explanation:
I'm not entirely sure what this is in relation to but I will try my best: the hydrosphere (water), Geosphere (land) and atmosphere (air) (there's also the biosphere but that's just the living things on earth (plants and animals) but for now we will ignore this) are the three main "spheres"If one of the three main spheres are disrupted the others are also disrupted. think of it this way:
There's an earthquake on the sea floor from an underwater volcano which effects the geosphere and because of this earthquake there's a tsunami, and the volcano disrupts the air content adding things such as sulfur into the air.
so - a way you can shape the geosphere is by effecting one of the other spheres. ie. putting litter in streams.
Answer:
44.2 mmHg
Explanation:
We have to apply the colligative property of lowering vapor pressure:
P° - P' = P° . Xm
where P' refers to vapor pressure of solution
P° refers to vapor pressure of pure solvent
Xm is the mole fraction of solute
Let's determine the mole fraction (moles of solute / Total moles)
Total moles = Moles of solute + Moles of solvent
Moles of solute → 15 g . 1 mol/18g = 0.833 moles
Moles of solvent → 100 g . 1mol / 46 g = 2.174 moles
Total moles = 0.833 + 2.174 = 3.007
Xm = 0.833 / 3.007 = 0.277
We replace data in the formula: 61.2 mmHg - P' = 61.2 mmHg . 0.277
P' = - (61.2 mmHg . 0.277 - 61.2 mmHg) → 44.2 mmHg
Answer:
B) 10.1 L
Explanation:
Hello,
In this case, for the given chemical reaction which should be corrected as shown below:
Since 45.0g of calcium carbonate are used, the produced moles of carbon dioxide, via stoichiometry, are found to be:
Finally, since STP conditions are referred to a temperature of 273.15K and 1 atm, the volume, by using the ideal gas equation result:
So the answer is B) 10.1 L.
Best regards.