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What is the maximum number of electrons that can occupy one ​d orbital? [blank] What is the maximum number of electrons that can occupy one ​p orbital? [blank2] Answers are digits. 

What volume (ml) of [x] M HCl will consume [y] moles of Ba(OH)2? 2HCl + Ba(OH)2  BaCl2 + 2H2O Round your answer to an integer.   

If the hydronium ion concentration is 9.5 x 10-2 M, what is the pH of the solution? Your answer should have 2 decimal places.

Nitric oxide is made from the oxidation of ammonia: 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) What mass of nitric oxide (MM 30 g/mol)can be made from the reaction of [x] g NH3 (MM 17g/mol) with [y] g O2 (MM 32 g/mol)? Your answer should have at least 1 decimal place.

200 ml of water were added to [x] ml of aqueous [y] M NH3. What is the concentration (M) of the new solution?  Your answer should have 2 decimal places.

The following species are isoelectronic: Rb+, Kr and Br-. Rank their relative sizes. (largest, medium, smallest) [medium]Kr [smallest]Rb+ [largest]Br-   

P4O6 decomposes into molecular oxygen (O2) and phosphorus (P4). Calculate the number of moles of oxygen gas produced from the decomposition of  [x] moles of P4O6. (Molar mass P4O6 = 219.9 g/mol)  Answer should include 2 digits after decimal point

HCl can produce chlorine gas and water in the presence of a catalyst and oxygen, following this reaction: 4HCl + O2 → 2Cl2 + 2H2O If [x] g of HCl are allowed to react with excess oxygen, what is the amount in grams of water produced? Your answer should have 1 decimal place. 

What is the energy in J per mol of photons of waves with wavelength [x] mm?  h= 6.626 x10-34 J s Round your answer to 3 decimal places Notes: Calculate the energy for 1 mole of photons, not just one photon.

Sulfur trioxide (SO3) is produced from the oxidation of SO2 as follows: 2 SO2 + O2  →  2 SO3 What is the percent yield if 18 g of SO3 is isolated from the reaction of  21 g of SO2  and 10 g of O2.