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Calculatc thc final answcr and rcport to corrcct numbcr of significant figurcs_ Includc thc corrcct units in thc answcr179g 092 (11.31 mL 8.4054 mL)...

Question

Calculatc thc final answcr and rcport to corrcct numbcr of significant figurcs_ Includc thc corrcct units in thc answcr179g 092 (11.31 mL 8.4054 mL)

Calculatc thc final answcr and rcport to corrcct numbcr of significant figurcs_ Includc thc corrcct units in thc answcr 179g 092 (11.31 mL 8.4054 mL)



Answers

Carry out the following calculations, expressing each result with the correct number of significant figures:
$$
\begin{array}{l}{\text { (a) } 24.567 \mathrm{g}+0.04478 \mathrm{g}=? \mathrm{g}} \\ {\text { (b) } 4.6742 \mathrm{g} \div 0.00371 \mathrm{L}=2 \mathrm{g} / \mathrm{L}} \\ {\text { (c) } 0.378 \mathrm{mL}+42.3 \mathrm{mL}-1.5833 \mathrm{mL}=2 \mathrm{mL}}\end{array}
$$

Perform the following conversions for a 355 kilometers per second into centimeters per second. one km equivalent to 10 to the three m. Mhm. 10 to the minus two m is equivalent to one cm. Therefore this should be equal to 3.5, 5 times 10 to the 7th. Mhm centimetres per second. Yeah, and second conversion here, we're converting this into meters per milliseconds. one km equivalent to 10 of the three meters. Mhm in one millisecond is 10 to the minus three seconds, so this is equal to 355 m per millisecond for b 1228 grams per liter into grams per millimeter 10 to the -3l in one ml for this is equal to 1.2-8 grams per mil, A leader and then into kilograms per miller leader. So we use our answer from part first part here, we'll put 2-8 grams per mil Leader, 10 to the 3g in a kgram this is equal to 1.2-8 Times 10 to the -3 kilograms. Her miller leader proceed yeah 554 million Calvin per seconds. We're going to convert this into kelvin per second So one milli Calvin is equivalent to 10 to the -3 calvins. This would be equal to point 554 kelvin per second, starting with .554 Calvin per second. We're going to come with this into micro Calvin for milliseconds. So one Micro Calvin's opens a 10 to the -6 elvin and one milliseconds going to 10 to the minus three seconds. Mhm. This is equal tube 554 micro Calvin per millisecond and D 2554 mg, humility leader, converting this into grams per liter, one mg. It's equivalent to 10 to the -3 g. Yeah one ml equivalent of 10 to the -3 L. This is equal to 2.554 grams per liter, Starting from 2554 grams per leader, converting this into microgram per millimeter one micrograms, going to 10 to the -6 g and one ml according to 10 to the minus three leaders. Okay, this is equal to 2000 554 micrograms per mil.

Volume of sulfuric acid needed to neutralize the amount of sodium hydroxide that we start with. We'll take the volumes hydroxide given to US 27 milliliters. Converted leaders multiplied by similarity in order to get the moles of sodium hydroxide. Then recognize that two moles of sodium hydroxide needs to react with one mole of sulfuric acid in order to completely neutralize it. And we can take the polarity of the sulfuric acid solution, divide the polarity into the mold of sulfuric acid to get the volume of sulfuric acid in leaders and then convert the leaders into middle leaders, and we get 5.66 milliliters of sulfuric acid.

Considering this mixture, let's determine the volume of 0.1 Mueller nitric acid that must be added to achieve a final pH of 7.21 We have to consider all the neutralization is that take place? So let's start with our strong base. Strong base is K O H. So from here, which we can calculate the moles of K o. H. It's a strong base which is equal to the moles of H minus. So we get zero 500 Mueller times 100 mL 0.1000 Leaders will find that this is equal to a 0.500 moles of oh H minus and will then look at our strong acid from HCL. The malls of HCL Zico, TV moles of H Plus and Armel Arat E Here is 0.750 Mueller volume is 200 mL or 2000.2000 leaders and we'll find that the moles are equal 2.150 moles of H plus. Now we'll have some neutralization here We see that the H plus is greater than the O. H minus. Therefore the we can calculate the malls of H plus in excess should be equal 2.150 moles of H plus minus 3.500 moles of the H minus the minus would be completely neutralized, and we'll be left with 0100 moles of each plus left over in excess. Now let's look at our next two bases. They're both weak bases on DWI air told that we have p 043 minus, uh, ignoring the sodium spectator from any three p 04 and we have C n minus. Ignoring these again the sodium spectator so r k A of the contra get acid here, H p 04 to minus is equal to 4.8 times 10 to the negative 13 and R K for the conjugal H C N would be equal to 6.2 times 10 to the minus 10. Comparing these values here, we see that the K A for H P 04 to minus is, uh, much less so. This would be the weaker acid or the stronger base so the acid would first react. Eso the H plus well, first react the excess H plus well. First react with the P 043 minus. So the malls of N A three Peel four is equal to the moles of Peel 43 minus. And we have 0.100 Mueller and 50 mL Their 500.500 leaders in this workout. 2.500 moles p 043 minus. And so now we compare this to our H plus and uh H plus is still greater. So moles of H plus in excess is equal. 2.0 100 moles of the H plus minus 3.500 moles of the peel for three minus, and we're left with 30.500 moles of the H plus in excess. And now second, the H plus in excess will react with the C N minus. And so the moles of the in a CNN sodium spectator so moles CN minus and this is equal to 0.150 Moeller times 0.500 leaders, and this is equal to a 0.750 moles of CN minus and now this time we can see that the sea end minus will not be the same here. So h plus plus c n minus will produce H c N Andi. We'll set up a nice table and moles here. The H Plus is 0.500 CN minus is 0.750 This is zero minus 0.500 minus 0.500 plus 0.500 This would work out to zero 0.250 point 00500 Using the results of this, let's go ahead and way have excess CN minus so the C and minus will now react with be added nitric acid. And we use our Henderson Hasselbach equation. We have all of our values here on D P H desire to 7 to 1 p. K A for H CNS negative log 6.2 times 10 to the minus 10. We don't know how much of the nitric acid so plus log 0.0 to 50 Now I'm gonna add some nitric acid that would shift this to the right so minus X plus x so this will be minus X and 00500 plus x by adding the nitric acid solving this for X, you can solve this and plugging this into my equation solver. I find that X is equal 2.243 So that tells me that the moles of H N 03 added Z equals 2.243 Moles of a Channel three. And so the volume of a Channel three added a Z we told were given the majority 0.243 moles. And we know that as one moles per leaders that similarity and we consol this and it'll yield 0.243 leaders, or 24.3 mil leaders of H and 03 that needs to be added to achieve a Ph of 7.21 to this mixture.

Good day. In order to complete the table, we need to convert a given, you need to another unit. So unworthy is changing the unit without changing its values. Yeah, we will need to convert it using the conversion factors. So for the first one is 3 55 kilometers per second, 55 km/s. So we need to convert it in cm per second. Given 3 55 kilometers per second Where one km is 1000 l and one m is what? 100 centimeter. We will have an answer of 3.55 times 10 to the 7th centimetre. Where shotgun. So for the next one we have and meter for a millisecond it close 355 km/s. I'm working meat allow meters two m 1000 meeting and converting millisecond. The second Where one time sent to the another three seconds is one and yes, so this will give us 355. The 30s were merely second. So let's put it in our table above. Answed. Here is 3.55. I understand. To the servant. And here is three 55. So let's proceed for the next one. Which is 1228 grubs for 9 30. To solving for rahm Spor M. L. Rehab. 1001. 228 grab a spare leader, Divide by one leader is 1000 M. L. This will give us 1.28 promise for M. L. And thanks. I'm ready to her. Milagros for Mega 3 3. We have 1 2- eight drums predator. Yes. Mhm. one kg is 1000 g and one time I sent to the 60 m is one mega. Did there. So shall we We have 1.28 Times 10 to the six kilogram. Uh huh. Mega leader. So let's put it in our table for a letter B. Sorry. Here is I'm going to eight. Here is 1.2-8 Times 10 to the six. Next we have 554 Milic A. for a second. So Well let me see. 554. Really give shotgun and ready to. Okay, very second. We have 554 million likely. Very second. It was one million K. is one time stand to the -3. Okay. To solving we have point 554. Okay. For a second. Next, converting it into you. Okay, you're Amelia's. That gun Is equal to buy 50 for me lately. Where is that good? Famous? One time sent to the negative three seconds is one millisecond. And one day I sent to the negative three K's. Each one unity. Where one UK Each one to understand to the -6. Okay, so solving we have 554. You Okay? Where milliseconds? So let's put it in the game world. We have .554 and 554. And lastly we have 2.554 mg per ml. So 2.554 mg per ml converting to grubbs, Converting it to sorry to circle the answer 1st. Sorry. Um and where they it to us for M. L. Or leader We have 2.554 million g per ml. Where one liter is 1000 M. L. And one g is 1000 mg. This will give us the industry of 2.554 robert spray. Yeah I do. And come can ready to my program were a million meters. We have 2.554. You need ground brand later where one g 1000 mg and one I understand. To the -6 g. If one, my program, therefore, microgram into m l. S 2500 54. Now to complete our table, we put it in the able above. So you have two, four and 554 and 2000, No, or a table is complete. Thanks.


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