Inorganic Chemistry Answers

hydrogen may not be advantageous as a fuel because of

1.30g H2 is allowed to react with 10.4g N2 producing 2.74g NH3. Calculate the theoretical yield for the reaction and the percentage yield of the reaction

A mixture, weighing 6.000 grams, contains 41.50 % Na3PO4 and 58.50 % BaCl2 of the mixture, by weight. When dissolved in water, a precipitate forms via the double displacement reaction:

BaCl2(aq) + Na3PO4(aq) NaCl(aq) + Ba3(PO4)2(s)

If the reaction is quantitative, the yield of the solid barium phosphate should be

A lawn fertilizer is rated as 7.35% nitrogen, meaning 7.35 g of N in 100 g of fertilizer. The nitrogen is present in the form of urea, (NH2)2CO. How many grams of urea are present in 100 g of the fertilizer to supply the rated amount of nitrogen?

an element has a body centred cubic (bcc) structure with a cell edge of 288pm. the density of the element is 7.2 g/cm How many atoms are present in 208g of the element?

In this experiment I will find out how the temperature rise changes when 25cm^3 portions of sodium hydroxide solution are mixed with different volumes of hydrochloric acid between 5cm^3 and 45cm^3.

I understand that the temperature of the solution will increase as the amount of hydrochloric acid increases and that the optimum temperature change will be at 25cm^3 of hydrochloric acid. However it will start decreasing when more hydrochloric acid is added.

Can you explain how this relates to neutralisation, collision theory, exothermic reactions and why the optimum is at 25cm^3 and why it decreases after 25cm^3?

*I will be using the same concentration of NaOH and HCl (1 mol).
*I will not be using an indicator.

Thank you in advance.

-why we dont mention any charges in a chemical compound??

0.1M Na2HPO4 and 0.2MNaH2PO4.How much stock solutions and H2O would be needed to prepare 0.5M,2L of phosphate buffer at pH7.4?(pKa fr H2PO4 :7.2) can you guide me through it? i don't understand how this should be done.thanks

why binding energy of vanadium is highest instead of chromium which has more unpaired electrons