Concept explainers
Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.

Interpretation:
The number of Silicon atoms in unit cell of Silicon cubic lattice has to be determined.
Concept introduction:
In crystalline solids, the components are packed in regular pattern and neatly stacked. The components are imagined as spheres and closely packed. This phenomenon is called “close packing” in crystals. The two major types of close packing of the spheres in the crystal are – hexagonal close packing and cubic close packing.
Answer to Problem 11.43QP
The number of Silicon atoms in unit cell of Iron cubic lattice is
Explanation of Solution
Record the given data:
The unit cell is assumed that of a cubic shape and the edge length of the unit cell is given. Density of Silicon is given.
Calculate the volume of one unit cell of cubic lattice of Silicon.
Edge length of the cubic unit cell is given. The cubic value of edge length gives the volume of the unit cell.
Calculate the mass of one unit cell of cubic lattice of Silicon.
Density of the unit cell is given. The mass of unit cell is calculated using the equation
Calculate the average mass of one Silicon atom in unit cell.
The average mass of one Silicon atom in its crystal lattice is calculated using the atomic mass value of Silicon.
Calculate the number of Silicon atoms present in a unit cell.
The average mass of one Silicon atom in its crystal lattice is related to number of atoms per unit cell as follows –
Using this equation, the number of Silicon atoms present per unit cell has been calculated.
The number of Silicon atoms in unit cell of Silicon cubic lattice has been determined.
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Chapter 11 Solutions
CHEMISTRY 1111 LAB MANUAL >C<
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- 9arrow_forwardalekscgi/x/lsl.exe/1o_u-IgNslkr7j8P3jH-IQs_pBanHhvlTCeeBZbufu BYTI0Hz7m7D3ZS18w-nDB10538ZsAtmorZoFusYj2Xu9b78gZo- O States of Matter Sketching a described thermodynamic change on a phase diagram 0/5 The pressure on a sample of pure X held at 47. °C and 0.88 atm is increased until the sample condenses. The pressure is then held constant and the temperature is decreased by 82. °C. On the phase diagram below draw a path that shows this set of changes. pressure (atm) 3- 200 temperature (K) Explanation Chick Q Sowncharrow_forward0+ aleksog/x/lsl.exe/1ou-lgNgkr7j8P3H-IQs pBaHhviTCeeBZbufuBYTOHz7m7D3ZStEPTBSB3u9bsp3Da pl19qomOXLhvWbH9wmXW5zm O States of Matter Sketching a described thermodynamic change on a phase diagram 0/5 Gab The temperature on a sample of pure X held at 0.75 atm and -229. °C is increased until the sample sublimes. The temperature is then held constant and the pressure is decreased by 0.50 atm. On the phase diagram below draw a path that shows this set of changes. F3 pressure (atm) 0- 0 200 Explanation temperature (K) Check F4 F5 ☀+ Q Search Chill Will an 9 ENG F6 F7 F8 F9 8 Delete F10 F11 F12 Insert PrtSc 114 d Ararrow_forward
- x + LEKS: Using a phase diagram a X n/alekscgi/x/lsl.exe/10_u-IgNsikr7j8P3jH-IQs_pBan HhvlTCeeBZbufu BYTI0Hz7m7D3ZcHYUt80XL-5alyVpw ○ States of Matter Using a phase diagram to find a phase transition temperature or pressure Use the phase diagram of Substance X below to find the melting point of X when the pressure above the solid is 1.1 atm. pressure (atm) 16 08- solid liquid- 0 200 400 gas 600 temperature (K) Note: your answer must be within 25 °C of the exact answer to be graded correct. × 5arrow_forwardS: Using a phase diagram leksogi/x/sl.exe/1ou-IgNs kr 7j8P3jH-IQs_pBan HhvTCeeBZbufuBYTI0Hz7m7D3ZdHYU+80XL-5alyVp O States of Matter Using a phase diagram to find a phase transition temperature or pressure se the phase diagram of Substance X below to find the boiling point of X when the pressure on the liquid is 1.6 atm. pressure (atm) 32- 16- solid liquid 0. gas 100 200 temperature (K) 300 Note: your answer must be within 12.5 °C of the exact answer to be graded correct. 10 Explanation Check § Q Search J 2025 McGraw Hill LLC. All Rights Researrow_forward151.2 254.8 85.9 199.6 241.4 87.6 242.5 186.4 155.8 257.1 242.9 253.3 256.0 216.6 108.7 239.0 149.7 236.4 152.1 222.7 148.7 278.2 268.7 234.4 262.7 283.2 143.6 QUESTION: Using this group of data on salt reduced tomato sauce concentration readings answer the following questions: 1. 95% Cl Confidence Interval (mmol/L) 2. [Na+] (mg/100 mL) 3. 95% Na+ Confidence Interval (mg/100 mL)arrow_forward
- Results Search Results Best Free Coursehero Unloc xb Success Confirmation of Q x O Google Pas alekscgi/x/lsl.exe/1o_u-IgNslkr 7j8P3jH-IQs_pBanHhvlTCeeBZbufu BYTI0Hz7m7D3ZcHYUt80XL-5alyVpwDXM TEZayFYCavJ17dZtpxbFD0Qggd1J O States of Matter Using a phase diagram to find a phase transition temperature or pressure Gabr 3/5 he pressure above a pure sample of solid Substance X at 101. °C is lowered. At what pressure will the sample sublime? Use the phase diagram of X below to nd your answer. pressure (atm) 24- 12 solid liquid gas 200 400 temperature (K) 600 ote: your answer must be within 0.15 atm of the exact answer to be graded correct. atm Thanation Check © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center I Q Search L³ ملةarrow_forward301.7 348.9 193.7 308.6 339.5 160.6 337.7 464.7 223.5 370.5 326.6 327.5 336.1 317.9 203.8 329.8 221.9 331.7 211.7 309.6 223.4 353.7 334.6 305.6 340.0 304.3 244.7 QUESTION: Using this group of data on regular tomato sauce concentration readings answer the following questions: 1. 95% Cl Confidence Interval (mmol/L) 2. [Na+] (mg/100 mL) 3. 95% Na+ Confidence Interval (mg/100 mL)arrow_forwardSearch Results Search Results Best Free Coursehero Unlo x b Success Confirmation of Q aleks.com/alekscgi/x/sl.exe/10_u-lgNslkr7j8P3jH-IQs_pBan HhvlTCeeBZbufu BYTIOHz7m7D3ZcHYUt80XL-5alyVpwDXM TEZayFYCav States of Matter Using a phase diagram to find a phase transition temperature or pressure Use the phase diagram of Substance X below to find the temperature at which X turns to a gas, if the pressure above the solid is 3.7 atm. pressure (atm) 0. 32- 16 solid liquid gas 200 temperature (K) Note: your answer must be within 20 °C of the exact answer to be graded correct. Дос Xarrow_forward
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