It can allow the molecule (like water) to be polar because it has a negative and positive side to it (oxygen holds the negatives tight causing the hydrogens to be positive).
Experiments are usually done under the fumehood because the chemical processes will sometimes creates noxious or toxic gases
unknown chemical reaction could potentially create toxic fumes so generally a safety issue
sulfur dioxide will create a rotten egg smell off the top of my head which is used in order to detect gas leaks, wouldnt want to be smelling that, thinking there's a gas leak, evacuating the building, only to realize it was from an experiment or accidental mixture in the waste bin
Because phospholipids have a polar end (phosphorus) and a non polar end (lipid). Similar things mix together so the phospho end likes water and the lipid end doesnt and it tucks inside the membrane
0.04350179862
Explanation:
Make sure to check for sig figs though. Basically, you have 2.54 mL and you multiply that by the 0.789 g/mL and mL cancels out and you are left with 2.00406g. There are 46.06844 grams per mol of ethanol, so to cancel out grams we multiply by 1/46.06844. And then we are left with 0.04350179862 mol
Answer : Option A)
Explanation : From the given options;
A) is the molecule which forms double bonds with own atom and becomes stable. It covalently shares the two valence electrons in the valence shell and becomes an octet.
B) the water molecule does not forms double bond between H atom and O atom as the valency of oxygen is two and hydrogen is one. So two atoms of H forms a single bond with one atom of O.
C) molecule shares a covalent bond with the other atom of Cl. This does not forms a double bond as only one electron is needed for Cl to attain the octet state.
D) The N atom has 3 electrons for donating, which is fulfilled by each of Cl atoms as they need only one electron to be an octet. It forms a single bond as there are no lone pairs left to form a double bond.
Hence, the correct answer is molecule.