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# Elemental phosphorus occurs as tetratomic molecules, $\mathrm{P}_{4}$ .What mass (g) of chlorine gas is needed to react completely with455 $\mathrm{g}$ of phosphorus to form phosphorus pentachloride?

## $\mathrm{m}\left(\mathrm{Cl}_{2}\right)=\mathrm{n}^{*} \mathrm{Mr}=36,7^{*}(35,45+35,45)=2603,448 \mathrm{g}$

#### Topics

Chemical reactions and Stoichiometry

### Discussion

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##### Allea C.

University of Maryland - University College

##### Jake R.

University of Toronto

### Video Transcript

So we keep in the we have false where p for. Ah, we have river current gas and then the real Proteus R P c 05 So you would have 4 55 gram or P for what would be the mass off Korean gas they were required to accompany. React with? Ah, all the p four. All right, first of all, we have to buy. It's the chemical reaction because you know that you have to Ah, false for a Korean guests. We have a shoulder to produce a piece l five. So for this case, every for us. Ah, at ah for you. Even though the PC on fragile assured a now they have the same numbers over and that we will have 20. Ah, Corrie on. Right. So in the laugh of remission over the same number off Korean as well. So I'm going. I'm going to put a tent in front off the Korean Gas alive 12 off, 20 on the left, and also 20 on the right. So here we have the band's chemical reaction. So the next step is we're going to Ah, Culver. Ah, off the information we have todo Momo's so because we will have a P for So the mother master will be one off their false verbal. The mass times for would be 1 20.8 1 23.8 for double the Mass LP for So the number mostly we have our master vibe. I'm on the mask. So you won't be around 3.67 So is fleet for six? Seven more. All right, so, um, we know that this is Ah, limbo more will pee for So what about? How about a limbo move off our corner Gas? Whoring Guess Okay, so we can see that the Malaysia it's one, 2 10 1 to 10. So limbo more correct? Yes, I will be our free 0.67 But what times? 10. So were 36.704 Corrine gas. So just will be for current gas. Okay, so ah, for the mass over here, you just need to modify our number most. By the more the mass, the more the mass of current guests will be 35.45 times too. Because that we have to Corinne is 70.9, and then we will abide by the law, Bommel's and then we would. You were half 2602 uh, Gram for our mass off course.

University of Toronto

#### Topics

Chemical reactions and Stoichiometry

##### Allea C.

University of Maryland - University College

##### Jake R.

University of Toronto