Inorganic Chemistry Questions

The solubility of silver sulfate in water is 5.05 grams per liter. If a silver sulfate solution had a concentration of 5.05 grams per liter, it would be said to be saturated supersaturated unsaturated

The solubility of calcium hydroxide in water is 0.930 grams per liter. If a calcium hydroxide solution had a concentration of 5.94x10-3 grams per liter, it would be said to be relatively concentrated dilute

Part A A microwave oven operates at 3.00 GHz. What is the wavelength of the radiation produced by this appliance? Express the wavelength numerically in nanometers.

For the reaction shown, compute the theoretical yield of the product (in grams) for each initial amount of reactants. Ti+2F₂->TiF4 a) 5.0 g Ti. 5.0 g F₂ b) 2.4 g Ti, 1.6 g F c) 0.233 g Ti, 0.288 g F₂

Reduction is indicated when there is the loss of oxygen atoms or gain of hydrogen atoms gain of oxygen and hydrogen atoms gain of oxygen atoms or loss of hydrogen atoms loss of oxygen and hydrogen atoms I DON'T KNOW YET

The titration of a 20.0-mL sample of an H₂SO4 solution of unknown concentration requires 22.87 mL of a 0.158 M KOH solution to reach the equivalence point. What is the concentration of the unknown H₂SO4 solution?

Fill in the blanks. The forces that connect two hydrogen atoms to an oxygen atom in a water molecule are________, but the forces that hold water molecules close together in an ice cube are _________. intramolecular, intramolecular intermolecular, intramolecular intermolecular, intermolecular intramolecular, intermolecular

Zinc(II) sulfide reacts with oxygen according to the reaction: 2ZnS+3O₂->2ZnO +2SO₂ A reaction mixture initially contains 4.2 mol ZnS and 6.8 mol O₂. Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant is left?

Which of the following evidence does not support Alfred Wegener's idea of continental drift? (A)Fossils of plants and animals in climates where their survival would have been impossible. (B)The thickness of layers of ice in the Antarctic. (C)Mountain ranges on different continents lined up when coastlines were matched up. (D)Glacier scrapings on rocks on different continents lined up when coastlines were matched up.

A student started with 1.525 grams of copper (II) oxide and produced 3.500 g of copper (II) sulfate. What is the percent yield? The product is a hydrate. Use appropriate significant figures. Do not put a percent sign in the answer box. Please ignore extra zeros that will be automatically added to your answer by the system. Useful information: chemical equation: CuO(s) + H₂SO4 (aq)---> CuSO4 (aq) +H₂O(l) Formula weight of hydrated copper (II) sulfate = 249.677 g/mol Formula weight of copper (II) oxide = 79.545 g/mol

An electron resides in a 2p orbital. Which of the following statements is true? It has a charge equal to a proton, p The electron is in subshell = 2 The electron is in an orbital with a principal quantum number = 2 The electron is in the lowest energy subshell. The electron is in the highest energy subshell.

For each bond, show the direction of polarity by selecting the correct partial charges. I-F I-CI F-Cl The most polar bond is

What volume of hydrogen gas is produced when 56.1 g of sodium reacts completely according to the following reaction at 25 °C and 1 atm? sodium (s) + water (l) →sodium hydroxide (aq) + hydrogen(g)

In a certain city the homicide rate is decreasing at the rate of 3% per year. What is the exact half-life of the crime rate, rounded to two decimal places?

There were originally 3000 bacteria in a petri dish. The doubling time is 4 hours. How many bacter will there be in 10 hours? A city's population is growing at 2.5% a year. What is its approximate doubling time? A city's population is growing at 2.5% a year. What is its exact doubling time rounded to two decimal places?

A sample of hydrogen gas at 302 K and 0.376 atm occupies a volume of 3.57 L. If the gas is compressed-into a smaller volume, while at the same time it is heated to a higher temperature, the final gas pressure could be higher or lower than 0.376 atm depending on the final volume and temperature. will be lower than 0.376 atm. will be higher than 0.376 atm.

A 0.424 gram sample of hydrogen gas has a volume of 907 milliliters at a pressure of 3.29 atm. The temperature of the H₂ gas sample is

A chemist prepares a solution of silver(II) oxide (AgO) by measuring out 0.0031 μmol of silver(II) oxide into a 400. ml. volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's silver(II) oxide solution. Round your answer to 2 significant digits.

A sample of oxygen gas occupies a volume of 7.10 L at 62.0°C and 363 torr. If the volume of the gas sample is increased to 8.22 L, while its temperature is increased to 131.0°C, the resulting gas pressure will be

0.776 mol sample of hydrogen gas at a temperature of 21.0 °C is found to occupy a volume of 25.4 liters. The pressure of this gas sample is

If 0.00858 mol neon gas at a particular temperature and pressure occupies a volume of 168 mL, what volume would 0.00637 mol neon gas occupy under the same conditions?

If the volume of a sample of oxygen gas is 130.1 mL at 749.4 torr and 33.4 °C, what is the volume (in mL) at standard temperature and pressure (STP)? Do NOT include units in your answer. If you round during your calculation, be sure to keep at least three (3) decimal places. Report your answer to one (1) decimal place.

Aqueous hydrobromic acid (HBr) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H₂O). If 36.6 g of sodium bromide is produced from the reaction of 72.0 g of hydrobromic acid and 63.0 g of sodium hydroxide, calculate the percent yield of sodium bromide. Round your answer to 3 significant figures.

The Bohr model explains that the color of the flame is a reflection of the size of electronic transition that occurs in The cations. Based on your observation, in which metal cation did the smallest electronic transition occur? Provide a reason for your answer.

A student is describing a molecular geometry of the nitrate ion as having four electron regions. Do you agree with this statement? Justify your answer and provide any corrections details if you need to.

(CH₂(CH₂)6 CH₂) reacts with gaseous oxygen gas (O₂) to produce gaseous carbon dioxide (CO₂) and gaseous water ( (H₂O). If 4.18 g of water is produced from the reaction of 8.00 g of octane and 12.9 g of oxygen gas, calculate the percent yield of water. Round your answer to 3 significant figures.

Calculate the mass percent of a vinegar solution with a total mass of 96.82 g that contains 2.34 g of acetic acid

Write a 150 words for your initial response. Your first response is due by midnight of the second day of the unit. Provide links to the resources you used to conduct your research. You must respond to at least two other classmates on a separate day by midnight of the last day of the unit for full credit. While you can be supportive of your peers by saying, "I agree" or "Wow, I never thought of that", these statements alone are not sufficient, you must explain why. Any posts made after the last day of the unit will not be considered for a grade. Answer the question(s) below: During preparation for an MODL amalgam on tooth #4, the dentist notices that the decay extends well beyond his initial assessment and is very close to the pulpal chamber. He informs the patient that the treatment plan must be altered to see how the tooth will react now that the decay has been removed. What changes will need to be made in the setup?

Consider this reaction: 2H2(g) + O2(g) → 2H₂O(1) ΔHrxn = -484 kJ Calculate the enthalpy change for the formation of 100.0 g water.

Although we generally think of combustion reactions as involving oxygen gas, other rapid oxidation reactions are also referred to as combustions. For example, if magnesium metal is placed into chlorine gas, a rapid oxidation takes place, and magnesium chloride is produced. Mg(s) + Cl₂(g) → MgCl2 (s) What volume of chlorine gas, measured at STP, is required to react completely with 4.34 g of magnesium?

Consider the following reaction: 2 KCIO3(s) -> 2 KCI (s) + 3 O2 (g) For this reaction, the oxygen gas produced is collected over water at 27.0 °C in a 3.44 L vessel at a total pressure of 750.0 torr. How many grams of KCIO3 were consumed in the reaction? The vapor pressure of water at 27.0 °C is 26.0 torr. R = 0.08206 L atm/mol K Do NOT include units in your answer. If you round during your calculations make sure to keep at least 3 decimal places. Report your answer to one (1) decimal place.

What volume of oxygen gas is produced when 68.6 g of mercury(II) oxide reacts completely according to the following reaction at 25 °C and 1 atm? mercury(II) oxide (s) ---> mercury (l) + oxygen(g)

Solid phosphorus (P)and chlorine (Cl₂) gas react to form solid phosphorus pentachloride (PCI5). Suppose you have 9.0 mol of P and 3.0 mol of Cl, in a reactor.

According to the following reaction, how much energy is evolved/released during the reaction of 32.5 g B2H6 and 72.5 g Cl2? The molar mass of B2H6 is 27.67 g/mol. B2H6(g) + 6 Cl2(g) --> 2 BCl3(g) + 6 HCl(g) ΔH rxn=-1396 kJ A) 1640 kJ B) 238 kJ C) 1430 kJ D) 3070 kJ E) 429 kJ

Instructions: You may use your notes, textbook or other reference sources to complete the assignment. In order to receive full credit for a question, your answer must be clear, coherent and correct. The completed assignment is due by 5:00 PM on Thursday, November 4th. See the Chem 115 Blackboard course site for submission details. 1. For the polyatomic anion, NO₂™: a. Draw the best Lewis structure. Clearly show all bonds, lone pairs, and formal charges. b. Draw the structure in its proper three-dimensional arrangement. Clearly show all bonds, lone pairs, and formal charges. c. Identify the electron geometry of the central atom.

Potassium hydrogen phthalate a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP. How many grams of KHP are needed to exactly neutralize 20.7 mL of a 0.270 M sodium hydroxide solution ?

59. Consider the thermochemical equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover. C3H6O(1) + 4 O2(g) -> 3 CO₂(g) + 3 H₂O(g) ΔH rxn = -1790 kJ If a bottle of nail polish remover contains 177 mL of acetone, how much heat is released by its complete combustion? The density of acetone is 0.788 g/mL.

"Smelling salts," which are used to revive someone who has fainted, typically contain ammonium carbonate, (NH4)2CO3. Ammonium carbonate decomposes readily to form ammonia, carbon dioxide, and water. The strong odor of the ammonia usually restores consciousness in the person who has fainted. The unbalanced equation is (NH4)2CO3 (s)→ NH3(g) + CO₂(g) + H₂O(g) Calculate the mass of ammonia gas that is produced if 2.55 g of ammonium carbonate decomposes completely.

For the following reaction, 35.1 grams of aluminum oxide are allowed to react with 90.6 grams of sulfuric acid. aluminum oxide(s) + sulfuric acid(aq) → aluminum sulfate(aq) + water(l) What is the maximum amount of aluminum sulfate that can be formed? What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete?

The compound cobalt(II) acetate is a strong electrolyte. Write the reaction when solid cobalt(II) acetate is put into water. Include states of matter in your answer.

How many milliliters of 6.46 M hydrochloric acid solution should be used to prepare 4.50 L of 0.700 M HCI? mL

3PbO₂ + Br- + 6H+ ---> BrO3- + 3Pb2+ + 3H₂O In the above reaction, the oxidation state of lead changes from _ to _. How many electrons are transferred in the reaction?

A gas made up of homonuclear diatomic molecules escapes through a pinhole 0.859 times as fast as N₂ gas. Write the chemical formula of the gas.

Heeded for this question. When the following skeletal equation is balanced under acidic conditions, what are the coefficients of the species shown? H3ASO3 + CIO3 - ---> H3ASO4+ CIO₂ Water appears in the balanced equation as a (reactant, product, neither) with a coefficient of _. (Enter 0 for neither.) Which species is the oxidizing agent?

The half-life, T, for a particular radioactive element is 12 min. Find the decay rate of the element.

Calculate the number of milliliters of 0.636 M NaOH required to precipitate all of the Mg2+ ions in 187 mL of 0.718 M Mg(NO3)2 solution as Mg(OH)2. The equation for the reaction is: Mg(NO3)2(aq) + 2NaOH(aq) → Mg(OH)₂(s) + 2NaNO3(aq)

Determine the oxidation state for each of the elements below. The oxidation state of The oxidation state of The oxidation state of chlorine in cadmium in ices to access important value oxygen in chlorate ion CIO3 cadmium hydroxide Cd(OH)2 potassium peroxide K₂O₂ IS is is

A 12.8 g sample of an aqueous solution of nitric acid contains an unknown amount of the acid. If 20.0 mL of 0.299 M sodium hydroxide are required to neutralize the nitric acid, what is the percent by mass of nitric acid in the mixture?

For the following reaction, 19.8 grams of carbon dioxide are allowed to react with 38.6 grams of potassium hydroxide. carbon dioxide (g) + potassium hydroxide (aq)-potassium carbonate (aq) + water (l) What is the maximum amount of potassium carbonate that can be formed? What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete?

What volume of a 0.181 M potassium hydroxide solution is required to neutralize 18.8 mL of a 0.167 M hydrobromic acid solution?