A)assuming volumes are additive, what volume of water must be added to 28.0 mL of 1.25 M FeCl3 to prepare a 0.650 M FeCl3 solution?
B) what mass of Ca(OH)2 would be required to neutralize 120.0 mL of 0.350 M HClO4? molar mass= Ca(OH)2 74.08; HClO4 100.46
C) what is the minimum volume of 0.08475 M KOH needed to neutralize 10.00 mL of 0.1801 M H2C2O4?
D) a 10.0 L sample of an ideal gas at 25.0°C is heated at constant pressure until the volume has doubled. what is the final temp?

Which Relative Risk (RR) and confidence interval (CI) is most likely to be a causal relationship?

A) RR= 3.0 (95% CI 1.9-7.9)

B) RR= 3.0 (95% CI 0.3-12.2)

C) RR= 1.0 (95% CI 0.3-12.2)

D) RR= 1.0 (95% CI 0.3-4.3)

Part 1: Calculate the solubility (in M) of cobalt(II) hydroxide, Co(OH)2(s) in H2O. Ksp = 2.80×10-16 at a specific temperature

Part 2; What is the pH of this solution of cobalt(II) hydroxide?

Identify the single most acidic or basic principle species in each of the following solutions. Calculate its molarity or number of moles (your choice). In the case of any species other than H3O+ or OH-, write the net ionic equation for the reaction of that speicies with water. Calculate the pH of each solution.

a) 10.0 mL of 0.30 M HCL

b) 10.0 mL of 0.35 M HF

c) 10.0 mL of 0.25 KOH

d) 15.0 mL of 0.30 M NaOH

e) 15.0 mL of 0.20 M NH3

At 200°C, Kc​ = 1.6*10−10 for: N2​O(g) + NO2(g) ⇌ 3 NO(g). If 350 mL of NO measured at 797 torr and 25.0°C is placed into a 3.00 L container, what will be the molarity of N2​O at equilibrium when the reaction is heated to 200°C? what is the total equilibrium pressure, in units of torr at 200°C?

Use hand drawn pictures to describe your understanding of colligative properties of solutions at the particulate level. You should use each molecule drawn to represent 0.01 mol of that substance. You should be sure to include all components of your understanding in the representation. The molecules you are required to include in your explanation are glucose, magnesium chloride, aluminum sulfate. Make sure you have appropriate atom/molecule size. Note: You should be sure to include those components like concentration, effects on vapor pressure, effects on the algorithmic (mathematical process) problem solving solution, and what do the algorithmic solutions indicate. Each picture should have an explanation of every detail you felt was important.

"In a decomposition process, 2.40 g of impure CaCO3 (CaCO3 mixed with other substances that remain as residue) was decomposed at high temperature and a total pressure of 960.0 torr.

2.00 L CO2 gas was collected over water at 25.0 C. The Water Vapor Pressure is 26.0 torr at 25.0 C. Find Percent by mass of the pure CaCO3"

Thank you!

Read the following statement carefully and then answer the questions that follow.

The equilibrium constant (Kp) for the reaction of solid carbon with carbon dioxide producing carbon monoxide at 850 ºC, has a value of 0.70:

A. Write the reaction that takes place and the corresponding half-reactions.

B. Calculate the partial pressure of the equilibrium if you initially have 1 mole of CO2, in a 30 L container and at a temperature of 850 ºC, in addition to solid carbon.

C. Calculate the partial pressures of the equilibrium if you initially have 1 mole of CO2, under the same conditions as the previous section, but in a container whose volume is half. D. If the reaction is known to be endothermic, where will the system move if the temperature increases to 1000 ºC?

E. Assuming that the carbon monoxide formed in the above reaction is separated and a solution prepared by adding 1 L of water to said oxide; What is the final concentration in units of normality that would be obtained?

How much heat does it take to convert 0.500 kg of ice at -20^oC to steam at 250.^oC?

Heat capacities: ice, 2.1 J g^-1oC; liquid 4.2 J g^{-1 o}C^-1; steam 2.0 g^{-1 o}C^-1

Heat of fusion: 6.01 kJ/mol. Heat of vaporization: 40.7 kJ/mol.

Which of the following properties of a molecular compound can largely be explained by its intermolecular forces? Select as many as are applicable .Select one or more:

a) Vapor pressure

b) Covalent bond strengths

c) Solubility in various solvents

d) Enthalpy of combustion

e) Boiling point

f) Melting point

g) Hybridization of the atoms

Hyperthyroidism is a condition that occurs when the thyroid secretes an excess of hormones, leading to an increase in the metabolic rate of all the cells in the body. Hyperthyroidism increases the demand for glucose and for substrates for oxidative phosphorylation. Which metabolic pathways are active in the fasted state in the liver, muscle, and adipose tissue in order to meet this demand? Explain.

The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking bonds and the energy released during bond formation. One way to determine the overall energy change for a chemical reaction is to apply Hess’s law to add together a group of reactions which can be arranged such that the chemical equations, when combined, give the overall equation we are trying to characterize.

part 1

Write a balanced chemical equation for the combustion of gaseous propane in gaseous oxygen to produce gaseous carbon dioxide and liquid water.

part 2

Combine the following equations to determine the enthalpy change for the combustion of 1 mole of propane. Assume that solid carbon is graphite.

Part 3

The average propane cylinder for a residential grill holds approximately 18 kg of propane. How much energy (in kJ) is released by the combustion of 18.50 kilograms of propane in sufficient oxygen?

Name five additives, besides flour, yeast, water, sugar and salt, found on a label of a loaf of bread. State the function of these additives