A is the answer to the question
Mass is the measure of the quantity of the substance present in the sample containing a compound or molecule. The mass of sucrose in the sample is 171 g.
<h3>What is mass?</h3>
The mass of the compound in the sample is the product of the number of moles of the substance and the molar mass of the compound.
Given,
The molar mass of the sucrose compound = 342.3 g/mol
Number of moles of sucrose = 0.500 moles
Mass of sucrose is calculated as:
![\begin{aligned}\rm mass &= \rm moles \times molar \; mass\\\\&= 0.500 \;\rm moles \times 342.3 \;\rm g/mol\\\\&= 171.15 \;\rm gm\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%5Crm%20mass%20%26%3D%20%5Crm%20moles%20%5Ctimes%20molar%20%5C%3B%20mass%5C%5C%5C%5C%26%3D%200.500%20%5C%3B%5Crm%20moles%20%5Ctimes%20342.3%20%5C%3B%5Crm%20g%2Fmol%5C%5C%5C%5C%26%3D%20171.15%20%5C%3B%5Crm%20gm%5Cend%7Baligned%7D)
Therefore, option A. 171 gm is the mass of sucrose.
Learn more about mass here:
brainly.com/question/4058235
Sulfur has 6 electrons, so we put 6 in the first spot.
Oxygen has 6 electrons too, but since there are 3, we would multiply 6 times 3 , which equals 18, then add that too.
The 2 is added because there is that negative 2 at the top of the formular, which indicates the presence of two extra valence electrons.
the equation would be
6 + 18 + 2 = 26
Answer: Option d. pressure increase by a factor of 3
Explanation:
P1 = P
T1 = 300k
T2 = 900K
P2 =?
Volume is constant.
P1/T1 = P2/T2
P/300 = P2/900
P2 x 300 = P x 900
P2 = (P x 900)/300
P2 = 3P
The pressure increased by a factor of 3
Answer:
![\boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Csmall%20%5Csf%20%5C%3A%20Mass%20%5C%3A%20%20of%20%20%5C%3A%20H_2O%20%3D322.2%20%5C%3A%20grams%7D)
Explanation:
<em>Given:</em>
Mass of ferous (Fe) produced = 750 gram.
<em>To find:</em>
Mass of water produced= ?
<em>Solution:</em>
<em>Molar mass of Fe is 55.84 gram/</em><em>mol</em>
Let's find out the number of moles of ferous produced.
![\small \sf Number \: of \: moles = \frac{Given \: mass \: of \: substance }{Molar \: mass \: of \: substance}](https://tex.z-dn.net/?f=%20%5Csmall%20%5Csf%20Number%20%20%5C%3A%20of%20%20%5C%3A%20moles%20%20%3D%20%20%5Cfrac%7BGiven%20%20%5C%3A%20mass%20%5C%3A%20%20of%20%5C%3A%20%20substance%20%7D%7BMolar%20%5C%3A%20%20mass%20%5C%3A%20%20of%20%5C%3A%20%20substance%7D%20)
Substituting the given data in above formula.
![\small \sf Number \: of \: moles = \frac{750}{55.84}](https://tex.z-dn.net/?f=%20%5Csmall%20%5Csf%20Number%20%20%5C%3A%20of%20%20%5C%3A%20moles%20%20%3D%20%20%20%5Cfrac%7B750%7D%7B55.84%7D%20)
![\boxed{\small \sf Number \: of \: moles \: of \: Fe= 13.43 \: moles}](https://tex.z-dn.net/?f=%20%5Cboxed%7B%5Csmall%20%5Csf%20Number%20%20%5C%3A%20of%20%20%5C%3A%20moles%20%5C%3A%20of%20%5C%3A%20Fe%3D%2013.43%20%5C%3A%20moles%7D)
Now the given reaction is,
![Fe_3O_4 + 4H_2 \rightarrow 3Fe + 4H_2O](https://tex.z-dn.net/?f=Fe_3O_4%20%2B%204H_2%20%20%5Crightarrow%203Fe%20%2B%204H_2O)
- For every 3 mole of production of Fe, 4 mole of waters are produced.
- let for 13.43 moles of Fe x moles of H2O will be produced.
now calculate the number of moles of H2O
![\sf \: \frac{3}{4} = \frac{13.43}{x} \\ \sf x = \frac{13.43 \times 4}{3} \\ \sf x = 17.90 \: moles](https://tex.z-dn.net/?f=%20%20%5Csf%20%5C%3A%20%5Cfrac%7B3%7D%7B4%7D%20%20%3D%20%20%5Cfrac%7B13.43%7D%7Bx%7D%20%20%5C%5C%20%20%5Csf%20x%20%3D%20%20%5Cfrac%7B13.43%20%5Ctimes%204%7D%7B3%7D%20%20%20%5C%5C%20%20%5Csf%20x%20%3D%2017.90%20%5C%3A%20moles)
![\small \boxed{\sf number \: of \: moles \: of \: H_2O= 17.90 \: moles}](https://tex.z-dn.net/?f=%20%5Csmall%20%5Cboxed%7B%5Csf%20number%20%5C%3A%20of%20%5C%3A%20moles%20%5C%3A%20of%20%20%5C%3A%20H_2O%3D%2017.90%20%5C%3A%20moles%7D)
mass of one mole of H2O is 18 gram, so we can calculate mass of 17.90 moles.
![\small \sf \: Mass \: of \: H_2O = 17.90 \times 18 \\ \boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}](https://tex.z-dn.net/?f=%5Csmall%20%5Csf%20%5C%3A%20Mass%20%5C%3A%20%20of%20%20%5C%3A%20H_2O%20%3D%2017.90%20%5Ctimes%2018%20%5C%5C%20%20%20%20%5Cboxed%7B%5Csmall%20%5Csf%20%5C%3A%20Mass%20%5C%3A%20%20of%20%20%5C%3A%20H_2O%20%3D322.2%20%5C%3A%20grams%7D)
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