Other Chemistry Answers

If 0.65 moles of hydrogen occupies 9.0 L, how many moles must be added to inflate the balloon to 15.6 L?(round to two sig figs)

A gas has a pressure of 0.370 atm at 50.0 °C. What is the pressure at standard temperature? (round answer to three sig figs)

 If a gas in a closed container is pressurized from 15.0 atm to 16.0 atm and its original temperature was 25.0 °C, what would the final temperature of the gas be (in °C)? **Hint: You still need to convert to Kelvin, then convert back to Celsius also round the answer to the correct sig figs

A 225 gram of mercury has a volume of 16.5 ml. What is the density of mercury? What is its specific gravity?

How many grams of CuO will be formed from the decomposition of 2.1 grams of Cu(OH)

2?

1. What mass of CaCl2 has as many negative ions as 50.00 g of Al(NO3)3?
2. You are reacting an excess amount of hydrochloric acid with 150.0mL of sodium carbonate solution.  4.1L of carbon dioxide gas was collected at STP. Reaction yield was 85%. What was the concentration of sodium carbonate solution used in this reaction?    
3. 200.0mL of hydrochloric acid solution reacted with 200.0 mL of sodium carbonate solution used as an excess reactant. 227.0mL of carbon dioxide gas was collected at 22.0OC temperature and 1.00 Atm pressure. Yield was 85%

Na2CO3(aq)  +  2HCl(aq)   🡪    2NaCl(aq)  +   H2O(l)  +  CO2(g)

           What was the concentration of hydrochloric acid? 

Calculate the initial temperature if 4.2 kg piece of gallium metal absorbed 630122 J of heat at 224.1 C. [Given specific heat, s, of Ga = 0.368 J g-1 C -1]

a titration of a 25.00 ml sample of a hydrochloric acid solution of unknown molarity reaches the equivalence point when 39.12 ml of 0.3204 M naOh solution has been added. what is the molarity of the Hcl solution

Define buffer capacity

You need 8.0 mole of Na2Cr2O2 how much would this weigh?