Inorganic Chemistry Answers

what is the molecular weight of a gas if it weights 0.7g and occupies a volume of 1 litre?

8kg of gaseous N2 occupy 100 L flask at 300C. What's the pressure of the gas, using van der Waals equation? What's the pressure of the gas, using the ideal gas equation? What are the shortcomings of kinetic molecular theory that lead to the deviation in this calculation?

A mix of O, N, and Ar has total pressure of 1.5 atm. The weights of the gases in the mix are 1.42g, 1.00g, and .50g. Calculate partial pressure of each gas; if volume of mix is 2L, what's the temp of the gas? At this temp, what's the root mean square speed of the N molecules?

A vessel w/ a tiny hole in its wall is filled w/ O2 to pressure of 1 atm at 25C. In one minute period, 3.25g of O effuses out through hole into vacuum. The vessel is evacuated and filled with unknown gas at same pressure and temperature. In this case, only 1.96g of the unknown gas effuse out in one minute. Calculate molar mass of unknown gas.

Need some help, as I'm new to chemistry.
Let's suppose I had one cup of water, which had a pH level of 6.5. I also have phosphoric acid at 10% concentrate.

I need to know how much phosphoric acid would be a realistic amount to use to reduce the pH level of the water, and how much that amount would reduce it by.

I'm looking for an amount that could reduce the pH of the water by about 1 per increment. I realize that phosphoric acid might not be the best item to use for this task, but it's required.a

I'm really not sure how strong phosphoric acid is, so if 10% sounds absurd for one cup of water, feel free to give me recommendations.

What are some real-world applications in which pH is an important factor?

What makes a chemical reaction go to completion

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