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Use scientific notation to express each quantity with only the base units (no prefix multipliers).

d. 1.5 cg

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Use scientific notation to express each quantity with only the base units (no prefix multipliers).

a. 35 mL

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The ΔHf˚ of TiI3(s) is –328 kJ/mol and the ΔH˚ for the reaction Ti(s) + 3 I 2(g) → 2 TiI3(s) for the reaction is –839 kJ. Calculate the ΔH of sublimation of I2(s), which is a solid at 25˚C.

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Suppose that 26 g of each of the following substances is initially at 28.0 ºC. What is the final temperature of each substance upon absorbing 2.40 kJ of heat?

a) aluminum

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The structure of acetylsalicylic acid (aspirin) is shown below.

There is a structure for a benzene ring with a -COOH group attached to the first carbon and an -OCCH3 group attached to the second carbon. The first (from left to right) carbon of the-OCCH3 group has an oxygen atom attached by a double bond.
How many pi bonds are present in acetylsalicylic acid?

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Draw the Lewis structure for urea, H2NCONH2, the compound primarily responsible for the smell of urine. (The central carbon atom is bonded to both nitrogen atoms and to the oxygen atom.)

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An atomic emission spectrum of hydrogen shows three wavelengths: 121.5 nm, 102.6 nm, and 97.23 nm. Assign these wavelengths to transitions in the hydrogen atom.


1) 2 →1 , 2) 3 → 1 3) 4 → 1

1) 2 →1 , 2) 2 → 1 3) 4 → 1

1) 2 →1 , 2) 2 → 1 3) 3 → 1

1) 2 →1 , 2) 3 → 1 3) 3 → 1

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Determine the molecular geometry of IF4 + .

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Determine the energy of 1.60 mol of photons for each of the following kinds of light. (Assume three significant figures.)

infrared radiation (1510 nm)

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Write balanced complete ionic and net ionic equations for each acid–base reaction.

Write a balanced complete ionic equation for: HCHO2(aq) + NaOH(aq

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Write balanced net ionic equation for Na 3PO4(aq) + NiCl2(aq) → Ni3(PO4)2(s) + NaCl(aq)

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Complete and balance each of the following equations for acid-base reactions.

H2SO4(aq) + NaOH(aq) →

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For the reaction shown, compute the theoretical yield of the product (in moles) for each of the following initial amounts of reactants.

Ti(s) + 2Cl2(g) → TiCl4(s)

8 mol Ti, 19 mol Cl2

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Calculate how many moles of NO2 form when each quantity of reactant completely reacts.
2N2O5(g) → 4NO2(g) + O2(g)

2.6 mol N2O5

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Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.

The silver isotope with 60 neutrons

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Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.

The silver isotope with 62 neutrons

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Enter isotopic symbols of the form X-A (e.g., C-13) for each isotope.

The uranium isotope with 146 neutrons

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Determine the number of protons and neutrons in each of the following isotopes.

86222 Rn

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The amount of carbon-14 in artifacts and fossils is often used to establish their age.

Determine the number of protons and neutrons in a carbon-14 isotope.

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The amount of carbon-14 in artifacts and fossils is often used to establish their age.

Write its symbol in the form ZA X.

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Determine the number of protons and neutrons in each of the following isotopes.

714 N

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Determine the number of protons and neutrons in each of the following isotopes.

1123 Na

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Determine the number of protons and neutrons in each of the following isotopes.

82208 Pb

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Perform the following calculations to the correct number of significant figures.

0.004 + 0.09853

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Perform the following calculations to the correct number of significant figures.

1250.5 + 7.50 + 6.00

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