Interpretation:
Whether the weight of
Concept introduction:
Molar mass of the molecule is equal to the sum of the
Mole is SI unit which is used to measure the quantity of the substance. It is the quantity of a substance which contains the same
The one mole of any substance is equal to the
Number of moles of compound can be calculated by below formula:
Number of moles =
A conversion factor is a numerical ratio which is used to show a measurement in one unit as another unit. It is always equal to 1.
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
GENERAL CHEMISTRY(LL)-W/MASTERINGCHEM.
- The mole is the SI unit for the amount of a substance. The mass of one mole of pure table sugar is 342.3 grams. How many grams of sugar are in exactly 1/2 mole? What is the mass of 0.764 mole?arrow_forwardOn October 21, 1982, the Bureau of the Mint changed the composition of pennies (see Exercise 120). Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2% Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6% Zn and 2.4% Cu by mass. Does this account for the difference in mass among die pennies in Exercise 120? Assume the volume of the individual metals that make up each penny can be added together to give the overall volume of the penny, and assume each penny is the same size. (Density of Cu = 8.96 g/cm3; density of Zn = 7.14 g/cm3).arrow_forwardA compound contains only Mn and F. The ratio of Mn and F is 1.73 moles of F per 1 mole of Mn. If the empirical formula is expressed as MnFx, what is the numerical value for x? If the formula is MnF5, you would enter the number 5. Please enter a whole number (i.e. round the number to the nearest whole number) and DO NOT include any units.arrow_forward
- 1. The molecular formula for potassium hydrogen phthalate (abbreviated KHP) is C3H$O4K. What is the molar mass of KHP? Show all work with no rounding errors and have the final answer accurate to at least two decimal places.arrow_forwardSection 2-6 Carry out the following multiplications and divisions, expressing your answer in scientific notation to the correct number of significant figures. • NOTE: Enter numbers only; DO NOT SPELL the numbers. • Use a hyphen "-" for a negative sign. • DO NOT use a "+" symbol! . a) (3.200 × 107) × (1.10 × 10−²) × (2.3 × 10−7) b) 6.0x10-5 3.0x10³ X 10^ X 10^arrow_forwardCalculate the mass of forsterite (Mg, Sio,) that contains a trillion (1.000 x 104) magnesium atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. ?arrow_forward
- I tried solving this problem but I got stuckarrow_forwardA researcher is using 7.20 x 1023 molecules of chlorine gas (Cl2) in an experiment. How many grams of chlorine is the researcher using? Remember to include units (abbreviated appropriately) and the substance in your answer. Round your answer to the nearest 0.01.arrow_forwardHow many grams Fin 584.8 g Br2F6? Put the answer in the box in regular (non-scientific) notation. Use one figure past the decimal.arrow_forward
- 3. Now let's suppose it's your turn to be the professor. You want to write a question for your students using theoretical data. Suppose you want their "unknown liquid" to be toluene (molar mass = 92.1 g/mol). Using the data in the table below, what should the "mass of flask + unknown condensed liquid" be so that they can correctly identify toluene as their unknown? Mass of flask: 77.485 g Mass of flask + unknown condensed liquid: ????? Temperature of water bath: 100 °C Pressure of gas in our system: 0.997 atm Volume of gas in our system: 255 mL Group of answer choices: A) 78.250 B) 0.765 C) 1.04 g D) 78.525 garrow_forward40 SU ||| A chemist prepares a solution of iron (II) bromide (FeBr₂) by measuring out 46.4 mg of FeBr₂ into a 50. mL volumetric flask and filling to the mark with distilled water. Microsoft O W Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to the correct number of significant digits. O CHEMICAL REACTIONS Calculating ion molarity using solute mass Microsoft Microsoft 6.52.210... esc mol L Explanation BEOO @ Check 9,208 280 103 NOV 6 x10 $ 4 X % 5 atv S MacBook Pro A 6 & 7 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility * 66 8 Å ( 9 W ) 0 QU Ararrow_forward2. The approximate radius of a nucleus, r, is given by the formula r = A (1.3x10-13 cm), where A is the mass number of the nucleus. What is the radius of the 37AI nucleus in decimeter. The atomic radius of the Al is approximately 143 pm. If the diameter of this atom were 1.00 km what would be the diameter of its nucleus (in ft)? Calculate also the percentage of the total volume of the aluminum atom that is occupied by the nucleus. A) 3.9x1014, 0.088, 3.0x10-6 B) 3.9x1014, 0.088, 2.0x10-8 C) 3.9x1014, 0.068, 2.0x10-6 D) 3.9x1014, 0.088, 2.0x10-6 E) none %3D of the abovearrow_forward
- Introductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage Learning
- World of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning