Inorganic Chemistry Questions

In the coal-gasification process, carbon monoxide is converted to carbon dioxide via the following reaction: CO (g) + H2O (g) → CO2 (g) + H2 (g) In an experiment, 0.35 mol of CO and 0.40 mol of H₂O were placed in a 1.00-L reaction vessel. At equilibrium, there were 0.17 mol of CO remaining. Keq at the temperature of the experiment is_____________. 5.5 1.2 1.0 0.75 0.87

Draw the Lewis structure with the lowest formal charges for NO. Include any nonzero formal charges and lone pair electrons in the structure.

Click in the answer box to activate the palette. The half-life of thallium-201 is three days. What fraction of thallium-201 is still present in an individual after twelve days? (Report your answer in fraction format.)

Match the following scientists with their discover/belief. -Earnest Rutherford -Niels Bohr -JJ Thomson -Democritus -Werner Heisenberg -John Dalton Used the quantum theory to predict that electrons orbit the nucleus of an atom Proposed atoms are composed of positive and negative charges and believed that electrons are evenly disbursed within the atom Proposed different kinds of atoms called elements and stated that atoms cannot be created or destroyed Proposed all matter is composed of tiny, indivisible particles called atoms Discovered the atom's positive charge was in the center (nucleus) of the atom Believed the exact location of electrons at a given instance to be "uncertain"

YOU MUST SUBMIT WORK FOR THIS PROBLEM. Draw the Lewis structure for H₂CS. You must show adding up the valence electrons. Determine the following for the structure: •Molecular Shape • Bond Angle • Polarity

YOU MUST SUBMIT WORK FOR THIS PROBLEM. You are conducting Experiment 8: Molar Mass by Vapor Density as directed in the lab manual. You have determined the following. The volume of the flask is 255 mL. The boiling water temperature is 98.9°C. The barometric pressure is 773.4 mm Hg A) How will you determine the mass of your sample of gas? B) If the mass is determined to be 0.630 g. what is the molar mass of the gas? HELPFUL REFERENCE INFORMATION: PV = nRT atm L R = 0.08206 atm L/mol K 1 atm = 760 mmHg For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Be sure to answer all parts. Write a balanced equation showing how this nucleus decays to form an a particle: Es-252. (Give all nuclei in the form AZX.)

If the concentration of reactant X after 37s in a reaction was 0.0090 mol/L and after 80s was 0.0010 mol/L, calculate the average reaction rate. Answer to 5 decimal places in mol/Ls. Leave out units

Use the collision theory to provide an explanation of each of the following (2A each): a. Food spoils more rapidly on a counter than in a refrigerator b. Magnesium metal reacts much more quickly in concentrated HNO3 rather than dilute HNO3 c. Large piles of newspapers burn more quickly than the same mass of wood logs d. Paints and stains often have instructions that they should not be applied below 10°C

Arrange the following bonds by increasing bond polarity. CI-P Cl-Ge CI-S CI-CI Cl-Br

Be sure to answer all parts. The acid in acid rain is generally sulfuric acid (H₂SO₂). When this rainwater falls on statues composed of marble (CaCO3), the H₂SO4 slowly dissolves the CaCO3. Write a balanced equation for this acid-base reaction. (Include the phase of the substances.)

In electroplating of chromium, how many grams of chromium should be electrodeposited if you pass 4.60 A current through a solution of 0.180 M CrCl3 for one hour? (atomic weights: Cr 52.00; Cl 35.45 amu) A.2.98 g B.3.12 g C. 0.446 g D.9.06 g E.4.02 g

If the outside of the flask is not dried after vaporizing the liquid, will the molar mass of the compound be too high or too low? Explain.

Suppose you assumed that the atmospheric pressure was one atmosphere instead of the pressure that you recorded. Describe the error that would occur in reporting the molar mass.

Determine pH Solution containing 0.610 M HClO2 and 0.215 M LiClO2 if Ka of HClO2 is 6.30 x 10^-4. A PH 3.78 B. PH 8.35 C.PH 3.65 D.PH 5.78 PH 2.75

Determine pH of solution containing 0.210 M C6H7NH3Cl (Kb of C6H7NH2 is 3.50 x 10^-7) A. PH 5.35 B, pH 4.67 C. PH 4.11 D.PH 10.9 E. PH 3.57

When 5.5 g N₂ reacts with 2.2 g H₂ in the reaction shown below, how many grams of ammonia (NH3) will be produced? Show your work or explain your process. N₂ + 3 H₂ --> 2 NH3

2. a) Draw the Lewis structure of sulfite (SO32-) with minimized formal charges on all atoms and assign partial charges to each atom b) How many electrons is around central S atom? c) What is the hybridization of each atom?

Since vanadium can have more than one possible oxidation state, there are several different forms of vanadium oxide. One form of vanadium oxide contains 56% V. What is the name and formula of this compound? Show your work or explain your process.

Very dilute solutions can be measured in parts per billion that is, the number of parts in 1,000,000,000 parts of solution. To be effective, the concentration of digoxin, a drug used to treat congestive heart failure, must be 0.5-2.0 ng/mL. Convert both values to parts per billion (ppb).

How many milliliters of a 1.40 M glucose solution contains each of the following number of moles? a. 0.0740 mol b. 3.60 mol

Propyl acetate (CsH1002; molecular weight = 102.13 g/mol) is a water-soluble ester with a characteristic pear-like odor. A lab technician dissolves 5 g of this ester in enough water to give 250 mL of solution. Calculate the molarity of this solution, showing ALL your work. (2 pts)

Do atoms generally get bigger or smaller as you go down a group in the periodic table?

Write the full electron configurations for the following elements. F Mg2+ Si N P S²- K+ Ni As Kr

The initial volume of a gas cylinder is 750.0 mL. If the pressure of a gas inside the cylinder changes from to, what is the final volume the gas occupies? O2.14 L 3.151 L 0.321 L 1.750 L 0.630 L

If you were writing an electron configuration for a bromine atom, which elemental symbol would you place in the bracket? Kr Xe Ar Ne He

Lattice energy is _____ the sum of ionization energies of the components in an ionic solid the sum of electron affinities of the components in an ionic solid the energy given off when gaseous ions combine to form one mole of an ionic solid the energy required to convert a mole of ionic solid into its constituent ions in the gas phase the energy required to produce one mole of an ionic compound from its constituent elements in their standard states

Gas density can be calculated by dividing the mass of gas by its volume. If you took a balloon of gas and then warmed the balloon in a sunny window, what can now be said about the density of the gas in the balloon? The gas density will increase. The gas density will remain the same. The density of gases is independent of temperature. The gas density will decrease.

"When filling orbitals of equal energy, electrons fill them singly first with parallel spins." This is known as: Bohr's model. Ground state. Hund's rule. Pauli exclusion principle.

What is the wavelength (angstroms) of a photon that has an energy of 4.38 x 10^-18 J? 454 angstroms 1.31 x 10^9 angstroms 6.89 x 10^15 angstroms 1.45 x 10^-16 angstroms 2.30 x 10^7 angstroms

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii. True False

In Experiment 4, you isolate iron(III) hydroxide from the following reaction: Fe(NO3)3(aq) + 3 NaOH(aq) → Fe(OH)3(s) + 3 NaNO3(aq) What method was used to isolate this product? Why was this method used?

Of the following transitions in the Bohr hydrogen atom, the n=7→n=3 n=4 →n=2 n=4 → n = 7 n=3→n=2 All transitions absorb plotons of equivalent energy.

An FM radio station broadcasts electromagnetic radiation at a frequency of 90.2 MHz. The wavelength of this radiation is 2.71 x 10^10 0.301 3.33 2.71 x 10^16 3.33 x 10^6

Electromagnetic radiation with a wavelength of 665 nm appears as orange light to the human eye. The frequency of this light is 4.51 x 10^5 2.22 x 10^-15 4.51 x 10^14 2.00 x 10^11 2.00 × 10²

Determine the pH at the equivalence point of a titration between 50.0 mL of 0.173 M (CH3)2NH solution with 0.173 M HCIO4.

Is the calculated sodium hydroxide concentration higher, lower or the same as the actual sodium hydroxide concentration in the flask, if the oxalic acid that was weighed was not completely transferred to the volumetric flask? Explain your answer.

For this question, Kryptonite (Kp) is a fictional transition metal with all possible charges from +1 to +6. Name the following compound: KpP2 For this question, Vibranium (Vb) is a fictional metal in group 2 of the Periodic table. Write the formula for Vibranium Nitride

If you prepare a solution by adding sufficient amount of solute so that after heating and cooling the solution there is a visible amount of solid solute left in the bottom of the beaker, the solution would be considered _______ supersaturated unsaturated thermally saturated saturated

For this question, Adamantium (A) is a fictional transition metal with multiple possible charges. Write the formula for: Adamantium (II) Hyponitrite

A student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M so- dium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH(aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH(aq). (Remember that KHP is potassium hydrogen phthalate, KHC,H,O, NOT potassium hydrogen phosphorus!)

Use what you just observed to predict the following. How many drops of water can you put onto a penny before the water spills over the side? How many drops of alcohol before the alcohol spills over the side. Make a prediction, give it a try, and, most importantly, explain what's happening.

Which is a rare congenital medical condition known as hemangiectatic hypertrophy? Acquired Immune Deficiency Syndrome Turner's Syndrome Okippel-Trenaunay Syndrome Collagen disease

Write the complete electron configuration for the vanadium atom. Using NOBLE GAS notation write the electron configuration for the copper atom.

Which of the following statements is/are true for a compound AX4, where A has 6 valence electrons and X has 7 valence electrons? a) The Lewis structure cannot be drawn without violating the octet rule. b) The central atom, A, has 4 bonding and 2 non-bonding electron pairs around it. c) In order to create a valid Lewis structure, it must contain at least one double bond.

What is the total number of moles of products involved in the following reaction? CaCO3 (s) + 2HCI (aq) → CaCl₂ (aq) + CO₂ (g) + H₂O(g) 6 2 3 5

Given the following information, what is the ΔHºf (heat of formation for ZnS(s)? Thermochemical equation: 2ZnS(s) + 302(g) → 2ZnO(s) + 2SO2(g) ΔH°f of ZnO(s) = -348.3 kJ/mole ΔH°f of SO2(g) = -296.8 kJ/mole The heat of formation is ΔH°rxn = -878.2 kJ

What is the change in enthalpy in joules when 5.44 x 10^-4 mol of AgCl dissolves in water according to the following chemical equation: AgCl(s)→ Ag (aq) + CI (aq) ΔH = 65.5 kJ

Relate how intensity is different than texture Intensity is how Intense a plece of music Is and the texture is how hard or soft it sounds. Intensity is how dynamics, articulation and other factors that a composer may include in music affects the listener while texture is the amount of voices and how they work in cooperation with each other in a piece of music. Intensity is how hard or soft a piece of music sounds and texture is how intense it is. Intensity is how dynamics, articulation and other factors that a composer may include in music affects the musicians playing it while texture is the amount of instr and how they work in cooperation with each other in a plece of music.

What is the mass of one uranium pellet? 7 grams 70 grams 500 grams 50 grams