Which is the best reason for using an Erlenmeyer flask instead of another piece of glassware while filtering the cabbage solution? The Erlenmeyer flask is the only container that can hold a liquid. The Erlenmeyer flask's narrow mouth makes it easier to pour the solution. The Erlenmeyer flask's narrow mouth can support the funnel and prevent breakage. X The Erlenmeyer flask is the only glassware that will accommodate a filter funnel.

4. How many atoms are found in a 15.3 g sample of bismuth? A. \( 1.26 \times 10^{26} \) atoms B. \( 4.41 \times 10^{22} \) atoms C. \( 6.02 \times 10^{23} \) atoms D. \( 9.21 \times 10^{24} \) atoms

How many mols are there in each of the following samples? (convert grams to mols) a. 42 grams of the radioactive isotope Carbon-14

Provide the number of protons, electrons, and neutrons in the following neutral elements, isotopes, and ions. If the mass number isn't provided, use the mass number for the most common isotope of that element. 1. Iodine-135 2. Nitrogen-15

How many grams are there in each of the following samples? (convert mols to grams) a. 3 mols of Beryllium-9

\( \begin{array}{l}\text { Gas nitrogen dioksida }\left(\mathrm{NO}_{2}\right) \text { dapat membentuk gas } \\ \text { dinitrogen tetroksida }\left(\mathrm{N}_{2} \mathrm{O}_{4}\right) \text { dalam kesetimbangan } \\ \text { sebagai berikut: } \\ 2 \mathrm{NO}_{2}(\mathrm{~g})=\mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \\ \text { Jika pada suatu suhu diketahui konsentrasi } \mathrm{NO}_{2}= \\ 0,2 \mathrm{M} \text { dan } \mathrm{N}_{2} \mathrm{O}_{4}=0,5 \mathrm{M} \text {, tentukan nilai konstanta } \\ \text { kesetimbangan } \mathrm{Kc} \text { untuk reaksi tersebut. }\end{array} \).