1) The pressure inside a hydrogen-filled container was 2.10 atm at 21 ∘C. What would the pressure be if the container was heated to 87 ∘C ?

2) At standard temperature and pressure (0 ∘C and 1.00 atm ), 1.00 mol of an ideal gas occupies a volume of 22.4 L. What volume would the same amount of gas occupy at the same pressure and 70 ∘C ?

The active ingredient in a zinc nutritional supplement is ZnSO4·7H2O (molar mass = 287.58 g/mol). Ten zinc tablets containing a mix of the active ingredient and an inactive filler were ground and mixed together thoroughly. The total mass of these ten tablets was 10.165 g. A 1.830 g sample of the finely ground tablets was dissolved in an acidic solution. The solution was neutralized with ammonia and subsequently warmed in a water bath. Addition of (NH4)3PO4 to the solution resulted in the precipitation of ZnNH4PO4. The precipitate was filtered and dried, then ignited to produce 0.234 g of Zn2P2O7 (molar mass = 304.76 g/mol). What is the mass percent of ZnSO4·7H2O in each tablet?

What is the average mass of the active ingredient ZnSO4·7H2O and inactive filler in each tablet?

HOI + NO = I2 + NO3-1 balance the following reaction in acid

Naphthalene is mostly insoluble in water. How would you recrystalize benzoic acid contaminated with naphthalene?

At 1 atm, how much energy is required to heat 49.0 g of H2O(s) at –10.0 °C to H2O(g) at 119.0 °C?

Technetium-99 is used as a radioisotope in a variety of medical applications . if a patient receives a dosage of 6.00 mg at 8 am on thursday , then how much would remain at 4pm on friday afternoon? the half life of Tc-99 is 6.0 hours.

What are the benefits and drawbacks in CZE (Capillary Zone Electrophoresis) with other more conventional separation technique, such as HPLC (High Performance Liquid Chromatography)?

A buffer solution was prepared by dissolving 4.00 grams of sodium propanate (NaCH3CH2CO2, FM 96.06 g/mol) in a solution containing 0.100 moles of propanoic acid (CH3CH2CO2H) and diluting the mixture to 1.00 L. pKa for propanoic acid is 4.874.

(a) To this solution was added 5.00mL of 1.00 M HCl. Calculate the pH of the resulting solution.

(b) To this solution was added 5.00mL of 1.00 M NaOH. Calculate the pH of the resulting solution.

can someone please give me name, structure and percebtage of FAME that are likely produces from the vegetable oil? i need 3! and it has to be similar to the fatty acid structure of vegetable oil!

Use the Henderson–Hasselbalch equation to calculate the pH of each solution:

Part A

a solution that is 16.5 g of HF and 22.0 g of NaF in 125 mL of solution

Part B

a solution that contains 1.23% C2H5NH2 by mass and 1.30% C2H5NH3Br by mass

Part C

a solution that is 15.0 g of HC2H3O2 and 15.0 g of NaC2H3O2 in 150.0 mL of solution

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Starting with a ccp array of anions, what structure types are generated by a) filling all tetrahedral sites with cations, b) filling half of the tetrahedral sites, e.g. T₊, with cations c) filling all octahedral sites with cations and d) filling alternate layers of octahedral sites with cations? Comment on the absence of any known structure type in one of these four categories.

Deep water fish are hard to transport to the surface safely. Why do you think that is?

As the water pressure decreases, there is not enough oxygen for the fish in the water

As the water pressure increase, the air in the swim bladder compresses until they burst.

As the water pressure decreases,the air in the swim bladder compresses until they burst. Is it this one... and explain why or why not

As the water pressure decreases,the air in the swim bladder expand. until they burst.