Answer:
94.44
Explanation:
Volume is equal to Mass/Density so therefore, you do the mass which is 68.0 g/0.72 g/mL which is the density and get 94.44 mL because the g cancel each other out when it comes to the label!
Answer:
3.56
Explanation:
pH refers to a measure of hydrogen ion concentration. It measures acidity or alkalinity of a solution. It usually ranges from 0 to 14.
If pH of aqueous solutions at 25°C is less than 7 then they are acidic, while aqueous solutions with a pH greater than 7 are alkaline.
Concentration of hydroxide ions = ![3.6\times 10^{-11}](https://tex.z-dn.net/?f=3.6%5Ctimes%2010%5E%7B-11%7D)
pH = ![-log \left ( 3.6\times 10^{-11} \right )=10.44](https://tex.z-dn.net/?f=-log%20%5Cleft%20%28%203.6%5Ctimes%2010%5E%7B-11%7D%20%5Cright%20%29%3D10.44)
pOH = 14 - pH = 14 - 10.44 = 3.56
Answer:
Explanation:
The molecular formula for Potassium Dichromate is K2Cr2O7. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Potassium Dichromate, or 294.1846 grams.
Note that rounding errors may occur, so always check the results.
Answer: Can pick it up and hold it, can rotate groups about bonds
and can look for symmetry
Explanation: A molecular model is a plastic model with interchangeable balls. Represents molecules and their processes.
The creation of mathematical models of molecular properties and behavior is molecular modelling, and their graphical depiction is molecular graphics, but these topics are closely linked and each uses techniques from the others.
As you move down a group, first ionization energy decreases. Electrons are further from the nucleus and thus easier to remove the outermost one