Answer:
Strong acids ionize completely in aqueous solutions while weak acids release a few ions in aqueous solutions.
Strontium (Sr) lies in the second group of the periodic table, which means it has two valence shell electrons so it forms the Sr⁺² ion. Meanwhile, bromine (Br) has seven valence shell electrons, which means it forms the Br⁻ ion. Each strontium atom is therefore able to donate electrons to two bromine atoms. So the ratio of the ions in neutral strontium bromate (SrBr₂) will be 1 : 2.
Answer:
Hello, Im Mack. Hope you're doing well. :)
Here is my Correct, custom answer for the lab Question, (I also took the same assignment and got a 100% score)
Explanation:
The heating of the sodium acetate solution made it change from super-saturated to un-saturated. Yet now that it cooled back to room temperature Im sure it is saturated. it wasn't able to disolve the excess sodium acetate left over at room temperature and had to be heated so now that it is back to room temperature I Think it will not disolve the sodium acetate left in the solution until it is heated again.
Hope this helped you out,
Please feel free to comment for further help, and I'll reply asap.
<u>Have a great day my friend :)</u>
*Necessary Information for the calculations*
Molar mass of carbon - 12.011 g/mol
Molar mass of copper - 63.546 g/mol
Molar mass of molecular oxygen - 31.998 g/mol
Avogadro's number - 6.022 x 10^23 atoms/mol
1. Moles of carbon in 19.2 grams of carbon (C)
To determine the number of moles carbon for a given mass of the substance, the mass of the sample is simply divided by its molar mass. Thus,
19.2 g C x <span><span> <u> 1 mol C </u></span><u> </u></span> = 1.599 mol C
12.011 g C
<span>
</span>2. Atoms of copper in 11.4 moles of copper (Cu)
To determine the number of atoms of a substance for a given number of moles, the latter is simply multiplied by Avogadro's number which represents the number of particles, molecules, or atoms of a any substance in 1 mole. Thus,
11.4 mol Cu x <u> 6.022x10^23 atoms Cu </u> = 6.865x10^24 atoms Cu
1 mole Cu
3. Mass of 3.15 moles of molecular oxygen (O2)
To determine the mass of a given number of moles of a substance, the former is simply multiplied by the molar mass of the substance. Thus,
3.15 mol O2 x <u> 31.998 g O2 </u> = 100.794 g O2
1 mole O2
4. Moles of silver in 6.51x10^24 moles of silver (Ag)
To determine the number of moles of a substance for a given number of atoms, the latter is simply divided by Avogadro's number. Thus,
6.51x10^24 atoms Ag x <u> 1 mol Ag </u> = 10.810 mol Ag
6.022x10^23 atoms Cu