Inorganic Chemistry Questions

Show the correct link to describe the type of solution: Sugar completely dissolves whenadded to hot coffee A layer of sugar forms on thebottom of a glass of iced tea Sodium chloride crystals do notdissolve in solution

What is the oxidation number of bromine as a reactant and in the product? Br in Br₂ Br in Al₂Br6

What mass of iron(III) hydroxide precipitate can be produced by reacting 85.0 mL of 0.290 M iron(III) nitrate with 199 mL of 0.200 M sodium hydroxide? Mass =

What mass of ammonia (NH3) will form when 8.6 g of N₂ reacts with enough H₂ to react completely? N₂ (g) + 3 H₂ (g) → 2 NH3 (9) 2.05 x 10³ g 10.5 g 20.9 g 2.62 g

A chemistry student weighs out 0.163 g of acrylic acid (HCH₂CHCO₂) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1700 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.

A chemistry student weighs out 0.158 g of ascorbic acid (H₂C6H6O6), a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1000 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits.

Given the two reactions 3. PbCl₂ (aq) = Pb²+ (aq) + 2Cl¯ (aq), K3=1.87x10-10, and 4. AgCl(aq) Ag+ (aq) + Cl(aq), K4 = 1.26x10-4, what is the equilibrium constant Kfinal for the following reaction? PbCl₂ (aq) + 2Ag+ (aq) = 2AgCl(aq) + Pb²+ (aq) Express your answer numerically.

Ni(OH)₂ + HPbO₂- ---> NiO₂+ Pb+ H₂O+ OH- In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: formula of the oxidizing agent: name of the element reduced: formula of the reducing agent:

Draw the Lewis structure for BF3 in the window below and then answer the questions that follow. • Do not include overall ion charges or formal charges in your drawing. /

Sulfur dioxide gas and liquid water are formed by the decomposition of aqueous sulfurous acid (H₂SO3). Write a balanced chemical equation for this reaction.

The oxidation number of H is +1 and of O is -2 in most compounds. Although this statement applies to most compounds, a few important exceptions occur. • When H forms a binary compound with a metal, the metal forms a positive ion and H becomes a hydride ion, H. Thus, in CaH₂ the oxidation number of Ca is +2 (equal to the group number) and that of H is -1. Oxygen can have an oxidation number of -1 in a class of compounds called peroxides. For example, in H₂O₂, hydrogen peroxide, H is assigned its usual oxidation number of +1, and so O is -1. The algebraic sum of the oxidation numbers for the atoms in a neutral compound must be zero; in a polyatomic ion, the sum must be equal to the ion charge. For example, in HCIO, the H atom is assigned +1 and the O atom is assigned -2. This means the Cl atom must be +7. a. POCI3 Oxidation number = b. C₂O42- Oxidation number = c. HSO4- Oxidation number =

Show the correct link to the experimental conditions on the right: Supersaturated Dialysis Diffusion Osmosis • Copper ions can pass through a semi-permeable membrane while starch colloidal particles are held back • When a few crystals of potassium permanganate were added to an undisturbed water sample, it shows a purple coloration slowly expanding through water. • Water molecules pass through a semi-permeable tissue membrane from a 0.89% salt solution to a 10% salt solution Solution in which addition of sodium chloride crystallizes

Determine the oxidation number of each element in the following: a. NH3 N: H: b. SO32- S: O:

What is the total number of valence electrons in the Lewis structure of SeF2O? electrons Draw a Lewis structure for SeF2O. If the species contains oxygen, do not draw double bonds to oxygen unless they are needed in order for the central atom to obey the octet rule.

Determine the oxidation number for each atom in H3ASO3. As: H: O:

A chemistry student weighs out 0.0576 g of formic acid (HCHO₂) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1900 M NaOH solution. 'Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.

Mass of copper wire Mass of filter paper + product Mass of filter paper Mass of copper (II) oxide 1. Using your data, calculate how many moles of copper you used in reaction 2. Look carefully at the three reactions you have performed. What is the mole ratio between copper in reaction 1 and the copper (II) oxide produced in reaction 3? Using that information, calculate the theoretical yield of copper (II) oxide using stoichiometry. (Assume copper is the limiting reagent.)

Draw the Lewis structure for NO₂F in the window below and then answer the questions that follow. What is the electron-pair geometry for N in NO₂F? What is the the shape (molecular geometry) of NO₂F?

Calculate the solubility of oxygen in water at 25° C when the partial pressure of oxygen is 0.22 atm. The Henry's law constant for oxygen in water is 1.3 x10 mol/L.atm 8pts 218 g of glucose (molar mass 180.2g/mol) is dissolved in 460 ml. of water at 30° C. The density of water is 1.00g/ml. The Vapor pressure of pure water is 31.82 mm Hg. What isthe vapor pressure of the solution? How much is the vapor pressure lowering? 20 pts

Calculate the volume of 0.660-M NaOH solution needed to completely neutralize 16.3 mL of a 0.360-M solution of the monoprotic acid HBr.

Sort the following molecules according to increasing bond angles about the central atom: SF6, IF 5, NF3, CIF₂- IF5, SF 6, NF3, CIF₂- SF6, CIF2-, NF3, IFS SF6, NF3, IFS, CIF₂- IF5, NF3, CIF2-, SF6 CIF₂-, NF3, SF6, IF5

For the following electron-transfer reaction: Pb²+ (aq) + Zn(s) → Pb(s) +Zn²+ (aq) The reduction half-reaction is:

Create the Lewis structure of CF44 NOTE: do only the step asked for in each part and then click Check-don't work ahead to solve the final structure. Step 1. Count valence electrons in the molecule or ion. Do this by adding the periodic group numbers for each atom in the structure and adjusting for charge. Enter and Check. Step 2. Connect each pair of bonded atoms with a single bond by dragging bonds onto the molecule. Each bond decreases the number of available electrons by 2. Check.

When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown? I2 + Pb2+ ---> IO3- + Pb Water appears in the balanced equation as a (reactant, product, neither) with a coefficient of 0 for neither.) How many electrons are transferred in this reaction?

The reaction represented by the equation: C(s) + H₂O(1) CO(g) + H2(g) was carried out at 27°C. If the enthalpy change was 4500 J and the entropy change was 12 J. What was the free energy change AG?

Please complete the following reactions, and show the molecular equation, ionic equation and the net ionic equation for each equation: 6. K3PO4(aq) + Al(NO3)3(aq) → 7. Bel2 (aq) + Cu₂SO4(aq) → 8. Ni(NO3)3(aq) + KBr(aq) → 9. cobalt(III)bromide + potassium sulfide 10. barium nitrate + ammonium phosphate → 11. calcium hydroxide + iron(III) chloride → 12. rubidium fluoride + copper(II)sulfate

If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25°C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first. Al(s) + HCi(aq)+H2(g)

A sample of iron reacted with hydrochloric acid. The liberated hydrogen occupied 40.1 mL when collected over water at 27°C at a barometric pressure of 750 torr. What is the mass of the sample of iron? (Because of the collection of gas over water, the vapor pressure of the water must be subtracted from the barometric pressure to find the pressure of the hydrogen gas.) If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25°C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first.) Al (s) + HCI (aq) → AICI3(aq) + _H₂(g)

The chemical functional group cyano (CN) is an extremely toxic chemical due to how it binds to the iron in our hemoglobin. When the chemical species is further reduced by two electrons, they are donated into a specific orbital in the MO diagram that changes its properties. Please draw the MO diagram for CN³- showing correct energy positioning for atomic and molecular orbitals. Please also calculate the bond order, and identify the HOMO and LUMO.

A 12.8 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid. If 20.4 mL of 0.634 M sodium hydroxide are required to neutralize the hydrochloric acid, what is the percent by mass of hydrochloric acid in the mixture?

For each of the following equilibria, write the expression for the equilibrium constant K. and state their units. 1. 2NO2 ---> N2O4 2. N₂ + 3H₂ ---> 2NH3 3. CH3CH₂CO₂H(1 ---> CH3CH₂OH(CH3CH₂CO₂CH₂CH30) + H₂O

Calculate the volume of 0.410-M NaOH solution needed to completely neutralize 64.8 mL of a 0.820-M solution of the monoprotic acid HCl.

CIO4- + H₂S ---> CIO3- +S+ H₂O In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: formula of the oxidizing agent: name of the element reduced: formula of the reducing agent:

The reaction between aluminum and bromine is an oxidation-reduction reaction. What is the oxidation number of aluminum as a reactant and in the product?

2Cr³+ + 3Cu²+ + 7H₂O ---> 3Cu + Cr₂O72- + 14H+ In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element oxidized: formula of the oxidizing agent: name of the element reduced: formula of the reducing agent:

A 460.0-mL aliquot of 0.460 M aqueous potassium hydroxide is mixed with 460.0 mL. of 0.460 M aqueous magnesium nitrate. a Write a balanced chemical equation for any reaction that occurs. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)

Sodium hydrogen carbonate (NaHCO3), also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid (HCI), which the stomach secretes to help digest food. Drinking a glass of water containing dissolved NaHCO3 neutralizes excess HCl through this reaction: HCl(aq) + NaHCO3(aq) -> NaCl(aq) + H₂O(l) + CO₂(g) The CO₂ gas produced is what makes you burp after drinking the solution. Suppose the fluid in the stomach of a woman suffering from indigestion can be considered to be 150. mL of a 0.021 M HCl solution. What mass of NaHCO3 would she need to ingest to neutralize this much HCl ? Round your answer to 2 significant digits.

The equation for the reaction of AgNO3 with Cu metal is given below. What mass of Ag (s) will form from the reaction of 2.51 g of Cu, assuming that the Cu reacts completely? 2AgNO3(aq) + Cu (s) → Cu(NO3)2 (aq) + 2 Ag (s) 0.466 g 4.26 g 8.52 g 0.739 g

The Lewis representation above depicts a reaction between a halogen (blue) and a main-group element from group electron(s) to complete its octet, and gains these electrons by forming In this representation, each Y atom needs atoms of X There are _ unshared electron pair(s) and The bonds in the product are bonding electron pair(s) in the product molecule. (red). bond(s) with

A chemistry student weighs out 0.0825 g of hypobromous acid (HBrO) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1500 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.

Draw the Lewis structure for NF3 in the window below and then answer the question Do not include overall ion charges or formal charges in your drawing. What is the electron-pair geometry for N in NF3 ? What is the the shape (molecular geometry) of NF3?

What is the net ionic equation for the reaction below? 3 CaCl₂ (aq) + 2 Na3PO4 (aq) -> Ca3(PO4)2 (s) +6 NaCl (aq) 3 Ca²+ (aq) + 2 PO4³- (aq) → Ca3(PO4)2 (s) PO4³- (aq) + Cl¯ (aq) → CIPO4- (aq) Ca²+ (aq) + Na+ (aq) → CaNa (aq) 6 Na+ (aq) + 6 Cl¯ (aq) → 6 NaCl (aq)

How does an increase in reactant concentration increase the rate of a chemical reaction? it does not increase the rate of the reaction it increases the frequency of collisions of reactant molecules it increases the energy of the collisions it provides a new reaction path with a lower activation energy

Ethylene Glycol (EG) is a common automobile antifreeze. The molar mass of EG is 15pts 62.01g/moles. 651 g of EG is dissolved in 2505 g of water. Calculate- a. The Freezing point of the solution. Kr= 1.86 °C/m FP water = 0° C b. The Boiling point of the solution. Km = 0.52° C/m BP water- 100 °C George makes spaghetti for dinner. He places 4.01 kg of water in a pan and brings it to a Boil. Before adding pasta, he adds 58 g of table salt (NaCl) to the water and again brings It to a boil. What is the boiling point of the salt solution? 12 pts

2 K(s) + 2 H2O(1) 2 KOH(aq) + H2(g) ΔH= ? When 0.05 mol of K is added to 100 g of water, the temperature of the resulting solution rises from 25.00°C to 35.75°C. If the specific heat of the solution is 4.18 J/(g°C), calculate AH for the reaction. A. None of these choices is correct B.-5.41 kJ C.-180 kJ D.-360 kJ E. -90 kJ

A molecule of Co (CN) 3 (CI)3 exists as both a fac- and mer- isomer which both exhibit unique properties such as color and melting point. a. Draw the lewis structures for both the mer- and fac-isomers of Co(CN)3(CI)3 and label. Additionally identify and label if each structure is either achiral or chiral. b. Identify the point group of each isomer Fac= Mer=

What are the units for heat capacity and specific heat? Heat capacity: kJ/°C Specific Heat: kJ/g °C Heat capacity: kJ/g°C Specific Heat: kJ/g Heat capacity: g/kJ Specific Heat: g°C/kJ Heat capacity: g°C/kJ Specific Heat: g/kJ

You are given 250 mL solution and need to adjust the drip rate for a patient. Before you begin you notice that the pump dispenses 15 drops per mL. Based on this information, how many drops will the pump dispense per sec if it runs for one hour? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. 1 drop/sec 1.35x10 drops/sec 60,000 drops/sec 0.0046 drops/sec

A theoretical chemist is inspired by the completion of the periodic table and the naming of element 118, Oganesson (Og). The scientist predicts that there could exist element 119. Complete the following sentences based on the characteristics an element with this atomic number would have. Predicted element 119 would be classified as This element would have _ reactivity. This element's atomic radius would be _ other elements in the same family This element's ionization energy would be _ other elements in the same family.

Draw a Lewis structure for C4H10.