QuestionQuestion

Transcribed TextTranscribed Text

Directions: Express answers to the correct number of significant figures. Show all work. 1. Express the following numbers in proper scientific notation. A) 0.0000580900 B) 3809000 C) 0.0124 x 10-9 D) 202.00 2. Express the answers to the following problems in scientific notation with the correct number of sig figs: A) 6.000 x 40.0000 B) 30.447 + 6.79 3. Calculate the molar mass of calcium phosphate Ca3(PO4)2 4. Carry out the following conversions by DIMENSIONAL ANALYSIS. A) Convert: 8.23 x 1011 mg→kg B) How many moles of H2O are in a bottle that holds 500. g of water? 1.7800×1017 61.2+88.5 C) D) (8.000 x 1015) + (7.20 x 1016) C) What is speed of a train traveling 118 miles/hour in meters/second? D) Convert 0.000575 m3 → L E) Convert: 5.51 x 1017 nm → km F) What is the mass (in grams) of a single atom of Tin (Sn)? G) The pressure of a bike tire is 120. lbs/in2. Convert this to g/cm2? H) What mass of gasoline (in kg) are you putting in your car if fill up with 16.0 gallons? (Dgasoline = 0.671 g/mL) 5. What is the mass of aluminum needed to make an aluminum rod (cylinder) that is 4.85 m long with a radius of 6.25 mm? (V = r2L) 6. What length of copper wire with a diameter of 1.40 mm can be made from 1.85 kg of copper? 7. How many iron ball bearings (spheres) with a diameter of 3.00 mm can be made from 10.0 kg of an iron ore that is 47.0% iron? Assume all of the iron in the ore can be recovered from the refining process. (V = 4/3 r3) Directions: Express answers to the correct number of significant figures. Show all work. 1. Complete the following table for the neutral isotopes below: Isotope Name Cobalt – 64 Isotope Symbol 182Ta 73 Atomic # 20 Mass # 37 # protons # electrons # neutrons 18 20 2. Carry out the following conversions by DIMENSIONAL ANALYSIS. A) Convert: 2.33 x 105 L→dm3 B) What is the volume of 45.98 oz. of gold? (Density = 19.32 g/mL) C) What is speed of a bicycle traveling 25 mi/h in the units km/min? D) Convert 0.000323 nm3 → pm3 E) How many moles of aluminum nitrate are in 250. g of aluminum nitrate. 3. Provide the formulas of the following species: sodium sulfide nickel (II) phosphate hydroiodic acid aluminum hydroxide lead (II) oxide chromium (III) sulfite elemental fluorine periodate ion 4. Provide the names of the following species: KBr Na3P N2O Fe2O3 Ca(BrO2)2 SO3 MnO2 HNO2 Zn(NO3)2 CuSO4 SO32- 5. Write the symbol for each of the following ions: (a) the ion with a +1 charge, atomic number 55, and mass number 133 (b) the ion with 54 electrons, 53 protons, and 74 neutrons (c) the ion with atomic number 15, mass number 31, and a −3 charge (d) the ion with 24 electrons, 30 neutrons, and a +3 charge 6. Write the symbol for each of the following ions: (a) the ion with a +3 charge, 28 electrons, and a mass number of 71 (b) the ion with 36 electrons, 35 protons, and 45 neutrons (c) the ion with 86 electrons, 142 neutrons, and a +4 charge (d) the ion with a 2+ charge, atomic number 38, and mass number 87 7. An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.

Solution PreviewSolution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice. Unethical use is strictly forbidden.

    By purchasing this solution you'll be able to access the following files:
    Solution.pdf.

    50% discount

    Hours
    Minutes
    Seconds
    $60.00 $30.00
    for this solution

    or FREE if you
    register a new account!

    PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

    Find A Tutor

    View available Chemistry - Other Tutors

    Get College Homework Help.

    Are you sure you don't want to upload any files?

    Fast tutor response requires as much info as possible.

    Decision:
    Upload a file
    Continue without uploading

    SUBMIT YOUR HOMEWORK
    We couldn't find that subject.
    Please select the best match from the list below.

    We'll send you an email right away. If it's not in your inbox, check your spam folder.

    • 1
    • 2
    • 3
    Live Chats